XIII international grassland congress 
edited by E. Wejahn /    H.  Thons 
 - Berlin  Akademie - Verlag  1980 
 - 1590p. ; ill. :  Pbk 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Grasses
<br/><br/><label>LC Class. No.: </label>SB197 .I5 1980