Crow Indian Tribe: Soils Resources Report
http://www.blm.gov/pgdata/etc/medialib/blm/mt/field_offices/miles_city/og_eis/crow.Par.30157.File.dat/soils.pdf

Bureau of Land Management: Montana State Office


This 4-page PDF is part of the final statewide oil and gas environmental impact statement and proposed amendment of the Powder River and Billings Resource Management Plans. This section thoroughly describes the soils found on the Crow Reservation.

This resource is referenced here:
Subject: Geoscience:Soils, Environmental Science:Soils and Agriculture
Resource Type: Scientific Resources:Overview/Reference Work