United States. Bureau of Chemistry and Soils. (1937). Blast-furnace processes for production of phosphatic and potassic fertilizer materials. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Chemistry and Soils. Blast-furnace Processes for Production of Phosphatic and Potassic Fertilizer Materials. [Washington]: [s.n.], 1937.
MLA (9th ed.) CitationUnited States. Bureau of Chemistry and Soils. Blast-furnace Processes for Production of Phosphatic and Potassic Fertilizer Materials. [s.n.], 1937.
Warning: These citations may not always be 100% accurate.