Flora sporovykh rastenii S.S.S.R. Vol.4 

 - Leningrad  Botanicheskii institut  1957 
 - 419p.  27cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cryptograms
<br/><br/><label>LC Class. No.: </label>QK514.R8F6 Vol.4