A syllabus of Pennsylvania geology and mineral resources /
Ashley, Geo. H. 1866-
A syllabus of Pennsylvania geology and mineral resources / by George H. Ashley. - Harrisburg : Department of internal affairs, Topographic and geologic survey, 1931. - 160 p. incl. ill., maps, tables, diagrs. : II pl. (fold. col. map, fold. tab.) ; 23 cm. - Pennsylvania Geological survey, 4th (1919- ) Bulletin G1 . - Bulletin G ; 1. .
"Publications of the present [Pennsylvania] Geological survey": p. 147-150. "Publications of the second Geological survey": p. 152-154. "List of U. S. Geological survey publications on Pennsylvania": p. 155-158.
gs 31000177
Geology--Pennsylvania.
Mines and mineral resources--Pennsylvania.
Geology--Pennsylvania--Bibliography.
QE157 / .A83
PY G345/4.3 G1
A syllabus of Pennsylvania geology and mineral resources / by George H. Ashley. - Harrisburg : Department of internal affairs, Topographic and geologic survey, 1931. - 160 p. incl. ill., maps, tables, diagrs. : II pl. (fold. col. map, fold. tab.) ; 23 cm. - Pennsylvania Geological survey, 4th (1919- ) Bulletin G1 . - Bulletin G ; 1. .
"Publications of the present [Pennsylvania] Geological survey": p. 147-150. "Publications of the second Geological survey": p. 152-154. "List of U. S. Geological survey publications on Pennsylvania": p. 155-158.
gs 31000177
Geology--Pennsylvania.
Mines and mineral resources--Pennsylvania.
Geology--Pennsylvania--Bibliography.
QE157 / .A83
PY G345/4.3 G1