000 00284nam a2200121Ia 4500
008 170101s1938 xx 000 0 und d
082 _a581.6 H45S
100 _aHAYWARD, Herman E
245 0 _aStructure of economic plants
260 _bN.Y
_c1938
300 _a674p
942 _2ddc
_cB
999 _c11837
_d11837