United States Bureau of Soils

Soil Survey Volume 1997, V. 2

Bulletin Volume 58-74

Soil Survey of the Los Angeles Area, California

Soil Survey Volume 1984

Soil Survey Volume 1983

Bulletin Volume 72-74

Bulletin Volume 70

Bulletin Volume 96

Bulletin Volume 40-41

Bulletin Volume 29-41

Bulletin Volume 63-65

Bulletin - United States. Bureau of Soils Volume 96

Bulletin - United States. Bureau of Soils Volume 78-85

Bulletin - United States. Bureau of Soils Volume 57-68

Bulletin - United States. Bureau of Soils Volume 11-26

Bulletin - United States. Bureau of Soils Volume 53-57

Bulletin - United States. Bureau of Soils Volume 48-52

Soil Survey

Bulletin - United States. Bureau of Soils Volume 46-56

Field Operations of the Bureau of Soils

Bulletin - United States. Bureau of Soils

A Reconnoissance Soil Survey of Pennsylvania

Instructions to Field Parties and Descriptions of Soil Types; Field Season, 1904

Bulletin - United States. Bureau of Soils Volume 26-31