A transcript of an interview with Jim Moore (the man who married Violet at the Texas Centennial

• ​​​https://digital.utsa.edu/digital/api/collection/p15125coll4/id/794/download

Freakatorium, Johnny Fox Collection of Side Show iconography

• ​https://www.potterauctions.com/pdf/66_freakatorium_web.pdf

Side Show Photos by E.J. Kelly

• ​http://www.edwardjkelty.com/gallery.html

Syracuse Universities Libraries Side Show Image Collection 

• ​https://scrconline.syr.edu/xtf/search?brand=scrc;repository=scrc;f1-collection=Ronald%20G.%20Becker%20Collection%20of%20Charles%20Eisenmann%20Photographs

Michigan Quarterly Review "Beauty and the Freak"​ article by Rosemarie Garland Thompson

• ​https://quod.lib.umich.edu/cgi/t/text/text-idx?cc=mqr;c=mqr;c=mqrarchive;idno=act2080.0037.312;rgn=main;view=text;xc=1;g=mqrg

Truevine​ Article about the book

• ​https://intrepidpapergirl.com/truevine-3/

The Enquire and Evening News Article on the Hilton Sisters​1928

• ​https://www.newspapers.com/clip/11798870/hilton-sisters/

University of Washington Theatrical Photographs​

• ​https://digitalcollections.lib.washington.edu/digital/collection/sayre/search/searchterm/vaudeville/field/subjec/mode/all/conn/and/cosuppress/

Images of the Hilton Sisters​

• ​https://www.sciencesource.com/CS.aspx?VP3=SearchResult&VBID=2OPVHK9D29FTU&SMLS=1&RW=1448&RH=713

Vintage Everyday Images of the Hilton Sisters

• ​https://www.vintag.es/2019/03/daisy-and-violet-hilton.html

Daily Journal History of the Hilton Sisters​

• ​https://www.thedailyjournal.com/story/news/history/2015/06/10/local-history-vaudeville-siamese-twins-perform-at-levoy-theatre/71011656/

The San Antonio Express News Article on Hilton Sisters

• ​Film-rich-look-at-S-A-s-conjoined-twins-5599181.php

Medical Daily "The Curious​ Life of Conjoined Twins"

• ​https://www.medicaldaily.com/conjoined-twins-genetic-disorder-sex-and-dating-378876

Article on Hilton Sisters​

• ​https://www.messynessychic.com/2015/06/18/the-original-hilton-sisters/

Charlotte Magazine Article on Hilton Sisters​

• ​https://www.charlottemagazine.com/a-tale-of-two-sisters/

Cast Portraits from Tod Browning's Freaks​

• ​https://themindcircle.com/cast-portraits-from-tod-brownings-freaks-1932/2/

Australian Geographic The Strange Tale of Aboriginal Circus Performers​

• ​https://www.australiangeographic.com.au/topics/history-culture/2012/06/the-strange-tale-of-aboriginal-circus-performers/

"The Brighton United Twins" 1911 Articles​

• ​https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2332195/?page=1

​"Vaudeville old & new: an encyclopedia of variety performances in America" By Frank Cullen, Florence Hackman, Donald McNeilly

• ​https://books.google.com/books?id=XFnfnKg6BcAC&lpg=PA511&pg=PA511&q=harold+estep+marriage#v=snippet&q=harold%20estep%20marriage&f=false

Geology Today "​San Antonio Siamese Twins Have Unlike Finger Prints" 1927

• ​http://wiki.genealogytoday.com/San_Antonio_Siamese_Twins_Have_Unlike_Finger_Prints_1927.html

​"Inside the Never-Before-Seen Scrapbook of the Rubber Skin Lady, a 1930s-era Sideshow Star"

• ​https://www.weirdhistorian.com/inside-the-never-before-seen-scrapbook-of-the-rubber-skin-lady-a-1930s-era-sideshow-star/

1930s fashion reference​

• ​https://www.vintage-retro.com/1930s-womens-clothing/1930s-dresses/

1930s fashion reference​

• ​https://vintagedancer.com/1930s/women-1930s-fashion/

Time Magazine "Historic Images of African-American Life in the Great Depression"​

• ​http://content.time.com/time/photogallery/0,29307,2106839_2335560,00.html

Flashback Dallas Article on Texas Centennial​

• ​https://flashbackdallas.com/2014/06/06/centennial-rickshaw/

Flashback Dallas Article on Texas Centennial​

• ​https://flashbackdallas.com/category/texas-centennial/page/2/

Texas Escapes, ​Article on Texas Centennial 

• ​http://www.texasescapes.com/Centennial/San-Jacinto-Centennial-Association-n-Houston-Observances-Texas-Centennial-1936.htm

The Portal to Texas History​

• ​https://texashistory.unt.edu/search/?q=texas+centennial+exposition&t=fulltext

Fort Worth Public Libraries Digital Archives Texas Centennial​

• http://www.fortworthtexasarchives.org/digital/collection/p16084coll5/id/85/rec/7

Adaptive Clothing for Wheelchair Users​

• ​https://izadaptive.com

New York Public Library Digital Collections​

• ​https://digitalcollections.nypl.org/items/510d47da-c923-a3d9-e040-e00a18064a99#/?zoom=true

Advertising Archives​

• ​https://www.advertisingarchives.co.uk/en/page/show_home_page.html