"Prolonged survival of human sperm in chemically defined media at room temperatures."; "Norman, Charles.", "Goldberg, Erwin.", "Johnson, C. E.", "Porterfield, I. D. (Ira Deward), 1920-"; "Spermatozoa--Collection and preservation.", "Human reproductive technology."; "Norman, Charles.", "Johnson, C. E.", "Porterfield, I. D. (Ira Deward), 1920-", "Goldberg, Erwin."; "1960"; "Journal article reprint from: Nature, v.188:no.4752 (1960:Nov.26)."; ""; "P6660"; "pec"; "Human reproductive technology.", "Spermatozoa--Collection and preservation."; "14256"; .