1939 World's Fair
50) 1939 World's Fair Traffic Rules Digest
Pocket-sized,32-page guide to NYC traffic rules for 1939. This is a special edition published for the fair - presumably for all the people driving to the fair who are new to the city.
48) Copper Exhibit Souvenir Photo Book
More elaborate than it sounds - a souvenir record of the "Copper & Brass Industry Exhibit at the 1939 World's Fair Metals Building". Contains 29 individually-numbered original photos.