00373nam a2200121Ia 4500008004000000082001300040100002800053245005700081260006700138300000900205440000700214650003000221210210b1970   xxu||||| |||| 00| 0 eng d  a030 ENCY  aENCYCLOPAEDIA BRITANICA  aENCYCLOPAEDIA BRITANICA. (Plastics to Razin) Vol 18.  aChicago.bEncyclopaedia Britanica, Inc, William Benton.,c1970  a1197  a18  aEncyclopaedia Britanica