OBSERVATION ON HUMAN HEREDITY MANSON J. S. MANSON J.S. - LONDON H.K.LEWIS 1928 - 84 PAGES Zg means General Biology Page 520-524 in A to Z Accession Register (Acc. No. Zg1-Zg141) & Page 550-551 (Acc. No. Zg142-Zg176) Dewey Class. No.: ZG67