Michael, Prema. Ecological methods for field and laboratory investigations / Prema Michael. - New Delhi : Tata McGraw-Hill Publishing , 1984(rep1990). - xii,04p. : Ills. ; 26cm. . NULL ISBN: 0074517651 Rs. 150.00 Subjects--Index Terms: ECOLOGY-METHODOLOGY Dewey Class. No.: 577.078 / MIC/E