000 003030000a22001210004500
245 _aWork place for learning
100 _aPerkins, L.B.
260 _aNew York
_bReinhold Publishing Co.
_c1957
300 _a64 p. : ill., photos (some col.)
080 _a727.1
_bP4
041 _aEN
942 _cBK
_02
999 _c97410
_d97410