Yazar
James H Petro
5 cilt bulundu.
Cilt sonuçları
Soil survey, Ross County, Ohio
James H. Petro · [for sale by the Supt. of Docs., U.S. Govt. Print. Off.]
168 sayfa · 1967
Soil surveys / Soils / Maps
Soil survey, Clark County, Ohio
James H. Petro · U. S. Soil Conservation Service ; [for sale by the Supt. of Docs., U. S. Govt. Print. Off.]
139 sayfa · 1958
Soil surveys / Soils
Soil survey of Clark County, Ohio
James H Petro · The Service : [for sale by the Supt. of Docs., U.S. Govt. Print. Off.]
139 sayfa · 1958
Soil surveys / Soils / Maps
Soil survey, Fauquier County, Virginia
James H. Petro, United States. Soil Conservation Service, Virginia Agricultural Experiment Station · U.S. Govt. Print. Off.
231 sayfa · 1956
Soil surveys / Soils / Maps