SF Encyclopedia Picture Gallery
Robert A Heinlein. The Discovery of the Future . . . Speech Delivered by Guest of Honor at 3d World Science Fiction Convention, Denver, Independence Day 1941. Recorded on discs by Walter J. Daugherty (Los Angeles, California: A Novacious Publication, 1941) [nonfiction: chap: "3d" for "3rd" is sic: pb/nonpictorial]
Image courtesy of L W Currey, Inc