Integrated research programs constituting the U.S. contribution to t he International Biological Program. 

 - United States :    s.n.,    n.d. 
 - v. ;    28 cm. 
<br/><br/>  Report No.4 of the U.S. National Committee for the International Bio logical Program. Volume I and II 
<br/><br/><label>Subjects--Corporate Names: </label><br/> International Biological Programme.