000 00304nam a2200121Ia 4500
008 221001s1980 xx 000 0 eng d
020 _a0335085741
082 _a650 RES
245 0 _aResearch and development
260 _aMilton Keynes
_bOpen University Press
_c1980
300 _a42p.
942 _2ddc
_cBK
999 _c48910
_d48910