 | State Library of Massachusetts - 1908 - 462 Seiten
...in 1905. 285. Emmons, ä. F., and others. Contributions to economic geology, 1905. 286. Woolsey, LH Economic geology of the Beaver quadrangle, Pennsylvania....southern Beaver and northwestern Allegheny Counties. 287. The Juneau gold belt, Alaska, by AC Spencer, and Л reconnaissance of Admiralty Island, Alaska,... | |
 | 1907 - 1080 Seiten
...Valley Quadrangles, Pennsylvania ; by CHARLES BUTTS. Pp. 198, with 11 plates and 14 figures. No. 286. Economic Geology of the Beaver Quadrangle, Pennsylvania...(Southern Beaver and Northwestern Allegheny Counties) ; by LESTER H. WOOLBEY. Pp. 132, with 8 plates and 35 figures. No. 287. The Juneau Gold Belt, Alaska ; by... | |
 | United States. Bureau of Mines - 1909 - 908 Seiten
...Beaver quadrangle, Pennsylvania (southern Beaver_and "1. No. northwestern Allegheny counties), by L. II. Woolsey. Bull. No. 286, 1906. Coal, pp. 26-55. Economic geology of the Amity quadrangle, eastern Washington County, Pennsylvania, by FG Clapp. Bull. No. 300, 1907, 145 pp. Oil and gas fields... | |
 | 1907 - 968 Seiten
...pis. В 283. Geology and mineral resources of Mississippi, by AF Crider. 1906. 99 pp., 4 pis. В 2£6. 歔k ggc >އ 0 ca . 6ü n (U7y` ʔ2 1906. 132 pp., 8 pis. В 287. The Juneau Gold belt, Alaska, by AC Spencer, and a reconnaissance of... | |
 | 1906 - 734 Seiten
...pis. B 283. Geology and mineral resources of Mississippi, by AF Crider. 1906. 99 pp., 4 pis. B 2*6. Economic geology of the Beaver quadrangle, Pennsylvania...and northwestern Allegheny counties), by LH Woolsey. 1906. lit!! pp., 8 pla. B 287. The Juneau Gold belt, Alaska, by AC Spencer, and a reconnaissance of... | |
 | 1908 - 874 Seiten
...pis. B 283. Geology and mineral resources of Mississippi, by AF Crider. 1906. 99 pp., 4 pla. B286. Economic geology of the Beaver quadrangle, Pennsylvania...Beaver and northwestern Allegheny counties), by LH Wonlsey. 1906. 132 pp., 8 pis. B287. The Juneau gold belt, Alaska, by .\. c. spencer, and a rcmmmissaiicc... | |
 | Lester Hood Woolsey - 1906 - 168 Seiten
...pls. B 283. Geology and mineral resources of Mississippi, by AF Crider. 1900. 99 pp., 4 pls. B 286. Economic geology of the Beaver quadrangle. Pennsylvania...and northwestern Allegheny counties), by LH Woolsey. 1906. 132 pp., 8 pis. Correspondence should be addrest to THE DIRECTOR, UNITED STATES GEOLOGICAL SURVEY,... | |
 | Henry Gannett - 1906 - 644 Seiten
...pis. B 2S.1. Geology and mineral resources of Mississippi, by AF Crider. 1906. 99 pp., 4 pis. B 2f 6. Economic geology of the Beaver quadrangle, Pennsylvania...(southern Beaver and northwestern Allegheny counties), by L. II. Woolsey. 1906. 132pp., 8 pis. B 287. The Juneau Gold belt, Alaska, by AC Spencer, and a reconnaissance... | |
 | Harry Foster Bain - 1906 - 778 Seiten
...Geology and mineral resources of Mississippi, by AF Crider. 190ft. — PP-,4 pis. B 286. Economic ecology of the Beaver quadrangle. Pennsylvania (southern Beaver...and northwestern Allegheny counties), by LH Woolsey. 1906. — pp., 8 pis. B 287. The Juneau gold belt. Alaska, by AC Spencer, and a reconnaissance of Admiralty... | |
 | Geological Survey (U.S.) - 1906 - 234 Seiten
...pis. B 283. Geology and mineral resources of Mississippi, by AF Crider. 1906. 99 pp., 4 pis. B 286. Economic geology of the Beaver quadrangle, Pennsylvania (southern Beaver and northwestern Allegheny counOes), by LH Woolsey. 1906. — pp., 8 pis. B 287. The Juneau gold belt, Alaska, by AC spencer,... | |
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B 283. Geology and mineral resources of Mississippi, by AF Crider. 1906. 99 pp., 4 pis. 
