Editore: Wisconsin Geological and Natural History Survey, Madison WI, 1929
Da: Chequamegon Books, Washburn, WI, U.S.A.
Center Stapled Booklet. Condizione: Near Fine. Bulletin No. 72A Soil Series No. 50. Survey conducted in cooperation with the State Dept. of Agriculture. 44 pages.; 6 x 9 ".
Editore: Wisconsin Geological and Natural History Survey, Madison WI, 1927
Da: Chequamegon Books, Washburn, WI, U.S.A.
Center Stapled Booklet. Condizione: Very Good+. Bulletin No. 68, Soil Series No. 49, 270 pages. In nontechnical language gives a general description of Wisconsin's soils, crops and systems of farming to which they are adapted, and the treatments required to secure largest returns.; 6 3/4 x 9 3/4 ".