Proceedings of National Academy of Sciences of United States of America 

 - Washington DC  National Academy of Sciences of United States of America  1903 
<br/><br/> Lib.has V.92(1995), V.93(1996), V.94-V.100(1997-2003) 
<br/><br/><label>Universal Decimal Class. No.: </label>5(73)(06)(05)  / PRO