. . . . . "Program no. 632: A discussion about periodical cicadas, which are known for their loud song at birth. Based on a research paper by Dr. John A. Wilcox. Program no. 633: A discussion about the prospects for 1975 which include: the need for enough food for the American and global populaces, and ways to provide sufficient leisure for the project population. Based on a research paper by Dr. H.F. Miller."@en . . . . . . . "Forecasts"@en . . . "Periodical cicada"@en . "Radio serials"@en . "Nonfiction radio programs"@en . . . . . . . . . "Educational radio programs"@en . "Excursions in science. Program no. 632, Periodical cicada Excursions in science. Program no. 633, Nineteen seventy-five"@en . . "Science radio programs"@en .