Perhaps you should get in touch with Octavian Coifan through his blog 1000fragrances. He is the author of a perfume encyclopaedia (in Romanian) and is very knowledgeable on the matter.
I'm not a perfume historian, but I have a modest collection of newspaper articles on perfumery, from 1870 to present, which may be of interest to you. The older ones are almost exclusively from the NY Times. You can find the titles (with descriptions) in the press archive of my site; if you'd like a copy of any of these articles, send me an IM.
And if you read French, you may be interested in the following book:
Marie-Christine Grasse, Elisabeth de Feydeau
L'un des sens : Le parfum au XXe siècle
Toulouse: Editions Milan (2001)
Just out of curiosity... is your research focused on a specific country? Between the 30's and '50s there were considerable differences in trends, from one country to another.