00291nam a2200109Ia 4500008004100000082001500041100002100056245003700077250000900114260004200123300001600165190710s9999    xx            000 0 und d  a587,V443B,  aVasishta , P. C. 0aVascular Cytogams : Pteridophyta  a4th.  aNew DelhibS. Chand and Companyc1982  aviii; 512p.