W. I. Watkins / Henry Aaron

OCLC:81203826

W. I. Watkins / W. H. Metzger / J. R. Latta

SRLF:AA0006637896

Soil surveys

United States. Bureau of Plant Industry, Soils, and Agricultural Engineering / W.I. Watkins / I.C. Mowery / E.H. Templin / Texas Agricultural Experiment Station

OCLC:631171032

Arthur T. Sweet / William Isaac Watkins / W. I. Watkins

ERDC:35925000563608

Soil surveys

South Dakota Agricultural Experiment Station / F.C. Westin / G.J. Buntley / W.I. Watkins

OCLC:632603618

Arthur T. Sweet / William Isaac Watkins / W. I. Watkins

ERDC:35925000564846

Soil surveys

United States. Bureau of Plant Industry, Soils, and Agricultural Engineering / Ralph G. Leighty / M.B. Marco / W.I. Watkins / Minnesota Agricultural Experiment Station

OCLC:631170705

North Dakota Agricultural Experiment Station (Fargo) / W.I. Watkins / E.H. Smies / T.M. Bushnell

OCLC:632465624

W. I. Watkins / W. H. Metzger / J. R. Latta

OCLC:1223244503

Soil surveys

W. I. Watkins

OCLC:494297272

Soils

Frank O. McCain / W. I. Holmes

OCLC:28194798

Mines and mineral resources

G. A. Swenson / Alfred Conrad Anderson / W. I. Watkins / B. H. Williams / Clarence Lounsbury / R. R. Findley / L. G. Brackeen / M. E. Swann / Hoyt Sherard

LCCN:agr41000495

Soil surveys

James Alistair Kerr / W. I. Watkins / W. H. Pierre / Joseph Arthur Machlis / United States. Bureau of Soils

OCLC:761733434

Soil surveys

Alwin William Goke / Elmer Grant Fitzpatrick / Faye R. Lesh / W. I. Watkins / William James Latimer / W. H. Metzger / Warren Jacob Geib / L. E. Rose / William Carl Boatright / A. E. Shearin / J. R. Latta / Cash Henry Wonser

LCCN:agr38000693

Soil surveys

Earl S. Vanatta / Edmund Wilhelm Knobel / W. I. Watkins

OCLC:44903835

Soil surveys

WI Historical Society

OCLC:82685946