"A contribution from Bureau of Soils."Caption title.Bibliography: p. 13-14.Mode of access: Internet
"Contribution from Bureau of Chemistry and Soils."Caption title.Mode of access: Internet
"Joint contribution from Bureau of Chemistry and Soils and Bureau of Plant Industry."Caption title.B...
"United States Department of Agriculture in cooperation with Alaska, Minnesota, Montana, North Dakot...
Caption title."Contribution from Bureau of Chemistry and Soils."Bibliography: p. 30.Mode of access: ...
Contribution from Bureau of Chemistry and Soils.Caption title.Includes bibliographical references (p...
"April 1966."Caption title.Includes bibliographical references (p. [4]).Mode of access: Internet
Contribution from Soil Conservation Service.Caption title.Mode of access: Internet.
cover-title.Contribution from Bureau of chemistry and soils.Bibliography: p. 134-135.Mode of access:...
"In cooperation with the United States Department of Agriculture.""August 1953."Caption title.Biblio...
"Contribution from Soil Conservation Service."Caption title.Bibliography: p. 25-26.Mode of access: I...
Caption title."Contribution from Bureau of Plant Industry."Bibliography: p. 11.Mode of access: Inter...
"Contribution from Bureau of Agricultural Engineering."Caption title.Mode of access: Internet
"Contribution from Bureau of Chemistry and Soils."Caption title.Bibliography: p. 29-30.Mode of acces...
Joint contribution from Bureau of Agricultural Engineering and Bureau of Chemistry and Soils.Caption...
Caption title."Contribution from Soil Conservation Service."Bibliography: p. 42-50.Mode of access: I...
"Contribution from Bureau of Chemistry and Soils."Caption title.Mode of access: Internet
"Joint contribution from Bureau of Chemistry and Soils and Bureau of Plant Industry."Caption title.B...
"United States Department of Agriculture in cooperation with Alaska, Minnesota, Montana, North Dakot...
Caption title."Contribution from Bureau of Chemistry and Soils."Bibliography: p. 30.Mode of access: ...
Contribution from Bureau of Chemistry and Soils.Caption title.Includes bibliographical references (p...
"April 1966."Caption title.Includes bibliographical references (p. [4]).Mode of access: Internet
Contribution from Soil Conservation Service.Caption title.Mode of access: Internet.
cover-title.Contribution from Bureau of chemistry and soils.Bibliography: p. 134-135.Mode of access:...
"In cooperation with the United States Department of Agriculture.""August 1953."Caption title.Biblio...
"Contribution from Soil Conservation Service."Caption title.Bibliography: p. 25-26.Mode of access: I...
Caption title."Contribution from Bureau of Plant Industry."Bibliography: p. 11.Mode of access: Inter...
"Contribution from Bureau of Agricultural Engineering."Caption title.Mode of access: Internet
"Contribution from Bureau of Chemistry and Soils."Caption title.Bibliography: p. 29-30.Mode of acces...
Joint contribution from Bureau of Agricultural Engineering and Bureau of Chemistry and Soils.Caption...
Caption title."Contribution from Soil Conservation Service."Bibliography: p. 42-50.Mode of access: I...
"Contribution from Bureau of Chemistry and Soils."Caption title.Mode of access: Internet
"Joint contribution from Bureau of Chemistry and Soils and Bureau of Plant Industry."Caption title.B...
"United States Department of Agriculture in cooperation with Alaska, Minnesota, Montana, North Dakot...