Mathur, S. M. The planet earth/ S. M. Mathur - 1st ed. - New Delhi : National Book Trust, 2010. - x, 56p. - Young India library. . ISBN: 9788123758589 Subjects--Topical Terms: The Earth fileOceans.Major mountains.Notable peaks.Major rivers.Largest lakes. Dewey Class. No.: 550 / MAT/T