Pak, Gerrit Adriaan <br/><br/>
Selection of trichogramma for inundative biological control 
/by Gerrit Adriaan Pak 
 - Wageningen  [s.n.]  1958 
 - 224 p. 
<br/><br/><label>ISBN: </label>116392 
<br/><br/><label>Dewey Class. No.: </label>636.96  / PAK