Borthakur, S. K. Illustrated Manual of Ferns of Assam - Dehra: Dun Bishen Singh Mahendra Pal Singh , 2001. - viii,468p. Bibliographical references 451-458p; Index 459-468p ISBN: 8121102057 (hbd) Source: Reference Subjects--Topical Terms: Assam Ferns HandbookBotany