PARIHAR, N.S. An Introdunction to embryophyta (V2): pteridophytes N.S.Parihar - 3rd rev.ed. - Allahabad Central Book 1959 - vi, 272p. ill;tables Includes index ISBN: 0 Subjects--Topical Terms: BOTANY Dewey Class. No.: BOT 587 / PNn59