Recovery of soda ash from nahcolite and oil shale

"This report describes processes for recovering soda ash from nahcolite and oil shale and provides answers to questions 3, 4, and 5 in the Solicitor's memorandum of February 2, 1968, on the subject, 'Applications for preference-rights sodium leases.' Data from the Bureau of Mines, Geological Survey, Wolf Ridge Minerals Corporation, and Kaiser Aluminum and Chemical Corporation were used in preparing this report..."--Page 1.