587 VASHISHTA, P . C . PTERIDOPHYTA ( VASCULAR CRYPTOGAMS ) / / P . C . VASHISHTA. - 4TH ED. - DELHI: : SULTAN CHAND & CO.,, 1991. x , 512 P.. : PAPER BACK 5TH REV ED (1993 RPT ). : 70/- * PTERIDOPHYTA.
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