It's useless for this project, but I do remember reading a Soviet science fiction piece from the 1930s that was rather intriguing. Good Soviet schoolboys are transported to the future, where they witness the communist utopia. They spectate on a sporting competition that requires the athletes to pilot airplanes (airplanes with music instead of engine noise) and visit the Soviet Socialist Republic of Brazil. It's explained that the world was unified by the combined action of the Red Army and local revolutions. Fun stuff.
Holy crap, I actually read a translated excerpt from that story during my Russian history seminar last year. Forgot the title though, though I managed to find the anthology it was published in. I'll have for you tomorrow.
As for the topic at hand, if you’re looking for stories, I’d recommend just trawling the Internet for sites that archive transcriptions of books with expired copyrights.
Project Gutenburg is an excellent source. Forgotten Futures, which specialized in British SF from the pre-WWI period, is another good stop.
I would also recommend that you get ahold of some secondary sources as well. I’ve spent some time looking for scientific romances in the past, and one of the problems I’ve come across is the sheer difficulty of finding these stories. Most of these were pulp novels or magazine serials written to earn a quick buck, and as result little effort has been made in preserving them. A lot of the time, the only place you’ll ever find a title is in scholarly analysis of science fiction. Fortunately, there are plenty of those to go around. For basic reference purposes, I’d suggest finding a general encyclopedia of science fiction, preferably one focusing on the Victorian era. I’d also highly recommend
Voices Prophesying War, I. F. Clarke’s study of the “future war” in sci-fi. It predominantly focuses on material from the 1870-1914 period, but there’s plenty of interesting diversions. If you’re looking for studies of sci-fi outside the Anglo-Francosphere, my only advice would be to wander through a university library and grab any national sci-fi overviews you can find. I know there’s a few focusing on Russian/Soviet SF floating around out there.