A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
General conditions; domestic mine production; sales of domestic phosphate rock, by uses; stocks; review by States; imports; exports of phosphate rock, superphosphates and other fertilizer materials; consumption of phosphate rock in United States; world production. (price 5 cents)
General conditions; domestic mine production; sales of domestic phosphate rock, by uses; stocks; review by States; imports; exports of phosphate rock, superphosphates and other fertilizer materials; consumption of phosphate rock in United States; world production. (price 5 cents)
Phosphate rock in 1929
U. S. Bur. Mines -- Mineral Resources
Johnson, B.L. (author)
1931
17 pages
Article (Journal)
English
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Online Contents | 1998
| Engineering Index Backfile | 1938
| Engineering Index Backfile | 1932
| Engineering Index Backfile | 1930
| Engineering Index Backfile | 1938