(1961). 100 problems in environmental health: A collection of promising research problems. Washington: Kirby Lithograph.
Chicago Stili Alıntı100 Problems in Environmental Health: A Collection of Promising Research Problems. Washington: Kirby Lithograph, 1961.
MLA Alıntı100 Problems in Environmental Health: A Collection of Promising Research Problems. Washington: Kirby Lithograph, 1961.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..