W. G. Harper

Soil survey of the Yuma Desert

Soil survey of the Yuma Desert area, Arizona

1941

Soil survey, Yuma desert area,

Soil survey, Yuma desert area, Arizona

1941

Soil survey of the Brighton ar

Soil survey of the Brighton area, Colorado

1935

Soil survey of the Roswell are

Soil survey of the Roswell area, New Mexico

1933

Soil survey of the Lovington a

Soil survey of the Lovington area, New Mexico

1932

Soil survey of the Salt River

Soil survey of the Salt River Valley area, Arizona

1931

Soil survey of the Buckeye-Bea

Soil survey of the Buckeye-Beardsley area, Arizona

1930

Soil survey of Columbia County

Soil survey of Columbia County, Oregon

1929