Robert Hill's doctoral dissertation,
"As a man, I exist; as a woman, I live": Heterosexual Transvestism and the Contours of Gender and Sexuality in Post-War America, is also available to read in full online. Lots of information on Tito/Susanna Valenti, Virginia Prince (basis for Reed Birney's character), Trasvestia Magazine, and Casa Susanna.
Hill collaberated with the editors of the Casa Susanna book and his research was used by Fierstein in the writing of the play. His disseration is very readable and fascinating, if anyone is interested in getting more information about the culture in the period.
http://deepblue.lib.umich.edu/bitstream/handle/2027.42/57615/rshill_3.pdf?sequence=2
"You travel alone because other people are only there to remind you how much that hook hurts that we all bit down on. Wait for that one day we can bite free and get back out there in space where we belong, sail back over water, over skies, into space, the hook finally out of our mouths and we wander back out there in space spawning to other planets never to return hurrah to earth and we'll look back and can't even see these lives here anymore. Only the taste of blood to remind us we ever existed. The earth is small. We're gone. We're dead. We're safe."
-John Guare, Landscape of the Body