A syllabus of Pennsylvania geology and mineral resources / by George H. Ashley.
Material type:
TextSeries: Bulletin G ; 1.Publication details: Harrisburg : Department of internal affairs, Topographic and geologic survey, 1931.Description: 160 p. incl. ill., maps, tables, diagrs. : II pl. (fold. col. map, fold. tab.) ; 23 cmSubject(s): LOC classification: - QE157 .A83
"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.
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