000 00327nam a2200121Ia 4500
008 160710s1955 xx 000 0 und d
082 _a373 H 21 S
100 _aHAMMOCK, ROBERT C.
245 _aSUPERVISING INSTRUCTION IN SECONDARY SCHOOLS
260 _bMCGRAW-HILL BOOK COMPANY, INC.
_c1955
300 _a316
942 _2ddc
_cB
999 _c15871
_d15871