. . . . "Educational radio programs"@en . . . . . "Program no. 602: A discussion about research into a new photographic glass. Based on research by E.U. Condon. Program no. 603: A discussion about facts and fallacies concerning snakes. Based on research by Roger Conant."@en . . . . . . "Nonfiction radio programs"@en . . . . "Radio serials"@en . "Excursions in science. Program no. 602, Photographic glass Excursions in science. Program no. 603, Snake facts and fallacies"@en . . "Photographic glass"@en . . "Science radio programs"@en . . .