000 00421 a2200181 4500
260 _aMaine
440 _nN° 822
260 _bMaine Agricultural Experiment Station
300 _a43p.
245 _aThe Economic Benefits of late-season black fly control
260 _c1988
130 _lEn.
690 _aRETARDSAISONNIER
690 _aINTERET ECONOMIC
440 _x0734-9548
999 _c27486
_d27486