Peter D. Ashlock, PRINCIPLES OF SYSTEMATIC ZOOLOGY by Ernst Mayr, Peter D. Ashlock - 1st ed. - New Delhi: McGraw Hill Education, 1964. - xx 475 pp: 23cm. ISBN: 978-93-392-0532-4 Subjects--Personal Names: ZOOLOGY. Subjects--Topical Terms: Specific topics in natural history Dewey Class. No.: 591.012 / MAY / MAY