Thomas Malthus. Three essays on population - Calcuta Oxford & Ibh Publishing Co 1960 - 144 p. ill. 18 cm. "A Mentor book." Subtitle at head of title on cover. Includes index. Nat. Bib. No.: GB60-15140 Subjects--Topical Terms: Population.Environmental geology. Dewey Class. No.: 301.3 / M17Q