000 00325nam a2200121Ia 4500
001 MPKV057973
008 120911s9999 xx 000 0 und d
082 _a630.715
245 _aJournal of Extension Vol 8
_c;
246 _aJournal of Extension Vol 8
260 _aWisconsin
_bMadison
_c1970
650 _aAgricultural Extention
999 _c55963
_d55963