000 00275pam a2200121a 44500
008 160408b1980 xxu||||| |||| 00| 0 eng d
082 _a531
_bOP2E
100 _a
245 1 _aBLOCK 8
260 _a
_bThe Open University Press
_c1980
964 _gCIRC
997 _aA69331 W
999 _c280387
_d280387