Beer,  Gavin de <br/><br/>
Homology an unsolved problem 
Sir Gavin de Beer 
 - London  Oxford University Press  1971[reprinted 1974] 
 - 15p.: ill;  25cm.- 
 - Oxford biology readers; no.11 .
<br/><br/><label>Dewey Class. No.: </label>591.3  / BEE