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- Mining and milling methods, Inland Lime and Stone Co., Port Inland, Michigan
- Mining methods and costs, Iowa Gypsum deposits
- Mining methods of the Fort Dodge Limestone Company, Inc., Fort Dodge, Iowa
- Sand and gravel operations and costs, Minneapolis-St. Paul area, Minn.
- Sand and gravel operations and costs, Concrete Materials and Construction Division, Martin Marietta Corp., West Des Moines, Iowa
- Mining and beneficiating methods and costs at two crushed- limestone operations, Madison County, Iowa