000 00307 a2200121 4500
080 _a632.5
_bA 285 P
245 1 _aPrinciples of weed control, Ahlgren, G.H.
_cby G.H. Ahlgren, et. al.
260 _aNew York
_c1957
650 _aWeed Control
100 1 _aAhlgren, G.H.
_d
300 _a368 p.
901 _a61863
999 _c46213
_d46213