000 00299nam a2200121Ia 4500
100 _aHahn, Robert O. & Bidna, David B.
250 _a2 nd Ed
942 _cBK
245 _aSecondary education
_borigins and directions
260 _aMacmillan, London
_c1965
082 _a373.73 Hah/Bid
300 _axi, 415
999 _c437
_d437