PURCHON, R.D THE BIOLOGY OF THE MOLLUSCA - 2ND ED. - Estados Unidos PERGAMON PRESS 1977 NEW YORK - 560 INTERNATIONAL SERIES OF MONOGRAPHS IN PURE AND APPLIED BIOLOGY. DIVION: ZOOLOGIA ISBN: 0080210287 LCCN: 25101 Subjects--Topical Terms: MOLUSCOS Dewey Class. No.: 594