000
00268nam a2200085Ia 4500
008
130123s9999 xx 000 0 und d
082
_a
631.4
245
_a
Journal of Soil and Water Conservation vol. 64 No. 1-6
260
_a
Iowa
_b
Soil Conservation Society of America
_c
2009
999
_c
81473
_d
81473