00461cam a2200157 i 4500020001500000082001200015100002100027245002500048250001100073260004000084300002600124490003700150520009000187650001300277650001300290  a039521670200a574 WEL  aWelch, Claude A.10aBiological science :  a3d ed.  aBoston :bHoughton Mifflin,cc1976.  axix, 764 p. :bill. ;0 aHoughton Mifflin science program  aA textbook relating biological information to the twentieth century social framework. 0aBiology. 1aBiology.