000 00285nam a22001097a 4500
082 _a373
_bHAM.S
100 _aHAMMOCK,ROBERT C and OWINGS,RALPH S
245 _aSUPERVISING INSTRUCTION IN SECONDARY SCHOOLS
260 _aNEW YORK:
_bMcGRAW HILL,
_c1955.
300 _a316p.
942 _cBK
999 _c326936
_d326936