Field operations of the bureau of soils

समान संसाधन

• Provisional soil map
  द्वारा: Wright A. C. S.
  प्रकाशित: (1958)
• Geologic map and strucrure sections of the rock creek oil field and adjoining areas, Wyoming
  द्वारा: Estados Unidos Geological Survey
  प्रकाशित: ([ca 1929])
• Map of the Western part of the northward extension of the sheridan coal field, rosebud and big horn counties, Montana
  द्वारा: Estados Unidos Geological Survey
  प्रकाशित: ([ca 1929])
• Map of the Eastern part of the northward extension of the sheridan coal field, rosebud and big horn counties, Montana
  द्वारा: Estados Unidos Geological Survey
  प्रकाशित: ([ca 1929])
• Map of Calvert county showing the Agricultural soils
  द्वारा: Clark William Bullock, और अन्य
  प्रकाशित: (1902)