Kolay, A.K. . Basic Concepts of Soil Science / Textual Documents A.K. Kolay. - 2nd ed. / - New Delhi : New Age International ( P ) Limited , 2000. - xi, 256p. : ill. ; 22cm . Index ISBN: 81-224-1199-1 Subjects--Index Terms: Geology-Soil Soil PG-Geology Dewey Class. No.: 550 / Ko 83 Ba