000 00327nam a2200121Ia 4500
001 MPKV052152
008 120911s9999 xx 000 0 und d
082 _a630.715
245 _aJournal of Extension Vol 10
_c;
246 _aJournal of Extension Vol 10
260 _aWisconsin
_bMadison
_c1972
650 _aAgricultural Extention
999 _c50154
_d50154