Pathak Promila [...et al] Orchids Science and commerce - Dehradun Bishen Singh Mahendra Pal Singh India 2001 - xxxvi, 521p. cm. ISBN: 8121102715 (hbk) Standard No.: 121248 Source: Gift, 18/09/2012, Textual Subjects--Topical Terms: BOTANY Dewey Class. No.: I715:12, P1