000			00532nam a2200157Ia 4500
008			140208s9999 xx 000 0 und d
044			_aU.S.A.
080			_a635.212 9 SI58F
100			_aSimpson, G.W.
245			_aFewer applications of DDT with proper timing produce equal fields of potatoes at less cost _cG.W. Simpson and W.A. Shands
260			_bUniversity of Maine _aOrono _c1954
300			_a28p.; 24cm.
490			_a(maine Agricultural Experiment station bulletin; no.533)
700			_aShands, W.A
942			_2udc _cPB
999			_c19493 _d19493