Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Frank C. Armstrong"'
Autor:
Frank C. Armstrong
Publikováno v:
The ANNALS of the American Academy of Political and Social Science. 150:105-111
COPPER imported into the United States from foreign countries costs less to produce than does copper produced in this country. The greater portion of our imported copper comes from mines in South America where very low production costs are possible,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a6d50c4c133b712da0a4610f9aaf329
https://doi.org/10.1177/000271623015000115
https://doi.org/10.1177/000271623015000115
Autor:
Frank C. Armstrong
Publikováno v:
Environmental & Engineering Geoscience. :249-251
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5073f5deaef4d6019184a4cc3fb69376
https://doi.org/10.2113/gseegeosci.xxi.2.249
https://doi.org/10.2113/gseegeosci.xxi.2.249
Autor:
Paul L. Weis, Frank C. Armstrong
From introduction: This report details the study to determine whether it might be worthwhile to attempt to recover uranium-bearing minerals that were previously dredged in a gold exploration in 1951 and discarded.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0fbddbf0712a02845f613a107056c752
https://doi.org/10.3133/tei562
https://doi.org/10.3133/tei562
Autor:
Paul L. Weis, Frank C. Armstrong
From abstract: Uranium on the Hooper Tunnel level of the Crescent mine, Shoshone county, Idaho, occurs in two red, iron oxide-stained radioactive zones in and along the hanging wall of Alhambra fault.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b115b7c28de2fa7a215237c825f290c
https://doi.org/10.3133/tem860
https://doi.org/10.3133/tem860
BS>About 50 occurrenccs of radioactive minerals and nearly 50 properties not abnormally radioactive were examined during geologic reconnaissance for radioactive minerals in Idaho, Washington, and western Montana during the period July 1952 to June l9
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ae8b5e289eedd1bab779202591b89965
https://doi.org/10.3133/b1074b
https://doi.org/10.3133/b1074b
Autor:
Roy P. Full, Frank C. Armstrong
Publikováno v:
Open-File Report.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd23300f4b8386f90d4877e69ef0ac9c
https://doi.org/10.3133/ofr5026
https://doi.org/10.3133/ofr5026
Publikováno v:
Professional Paper.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf3c612b0ee4b1e5eaa118c68473e6eb
https://doi.org/10.3133/pp394
https://doi.org/10.3133/pp394
Autor:
Frank C. Armstrong
Publikováno v:
Open-File Report.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f293c7ccfa20085b8d6a110a664a96d1
https://doi.org/10.3133/ofr592
https://doi.org/10.3133/ofr592