Bhatnagar, S.P. . Gymnosperms / Textual Documents S.P.Bhatnagar. - 1st ed. / - N.Delhi : New Age (P) Ltd. , 2005. - 470 : Photos,Fascimile ; Index,Bibliography ISBN: 81-224-0792-7 Subjects--Index Terms: Botany,Gymnosperms Dewey Class. No.: 585 / Bh 469 Gy