Proceedings of the Iowa academy of science seventy ninth session held at Waverly 19-20 April, 1968 

 - Des Moines:   State of Iowa,   1968 
 - 472p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>Universal Decimal Class. No.: </label>5(05)  / K8