Zoo Postcard Booklet Envelope, by Curt Teich & Co, 1935, Smithsonian Archives - History Div, Color envelope containing a booklet of eleven assorted postcards from the National Zoological Park. The left side of the front cover shows an image of a door with a stegosaurus above it, and the right side has space for an address. The back cover of the envelope shows a lion reposing in his enclosure..