000 00321nam a2200121Ia 4500
008 210324s1970 xx 000 0 und d
082 _a503
_bMCG-70
100 _aMc Graw HHill.
_9335676
245 _aYear book of science and technology, 1970.
260 _c1970
650 _aYearbook
_9335677
700 _aN.A.
_9335678
999 _c279108
_d279108