000 00372nam a2200133 a 4500
008 170703s1969#### ||||f#|||||00| 0#uuu#d
003 AR-SmCIES
091 _a23461
092 _av.2
245 1 0 _aSOURCES of physics teaching.
260 _a[s.l.] :
_b[s.n.],
_c1969.
999 _c20780
_d20780