erovnuli-samecniero-biblioteka Search for 'se,phr:"Bulletin G ;"'

Pennsylvania caves,

By Stone, Ralph W..
Harrisburg, Department of internal affairs, Topographic and geologic survey, 1930 .
63 p. incl. illus., maps. 23 cm..

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A syllabus of Pennsylvania geology and mineral resources /

By Ashley, Geo. H..
Harrisburg : Department of internal affairs, Topographic and geologic survey, 1931 .
160 p. incl. ill., maps, tables, diagrs. : , "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. 23 cm..

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Recent geological history of the Delaware Valley below the Water Gap /

By Ward, Freeman,.
Harrisburg, Pa. : Dept. of Internal Affairs, Topographic and Geologic Survey, 1938 .
v, 76 p. : 23 cm..

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The Devonian of Pennsylvania : Middle and upper Devonian /

By Pennsylvania..
Harrisburg, Pa. : Dept. of internatl affairs, Topographic and geologic survey, 1939 .
xii, 481 p. : , At head of title: Pennsylvania Geological Survey, Fourth series. 24 cm..

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Highway geology, Philadelphia to Pittsburgh,

By Willard, Bradford,.
Harrisburg, Pa., Department of internal affairs, Topographic and geologic survey, 1939 .
2 p.l., 42 p. , At head of title: Pennsylvania Geological survey, Fourth series. | On cover: Commonwealth of Pennsylvania. Department of internal affairs. 23 cm..

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Guide to the geology from Dauphin to Sunbury,

By Willard, Bradford,.
Harrisburg, Pa., Department of internal affairs, Topographic and geologic survey, 1939 .
24 p. , At head of title: Pennsylvania Geological survey, Fourth series. | On cover: Commonwealth of Pennsylvania. Department of internal affairs. 23 cm..

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Guidebook to the geology near Reading, Pa., by Bradford Willard and Donald M. Fraser.

By Willard, Bradford,.
Harrisburg, Pa., Department of internal affairs, Topographic and geologic survey, 1939 .
27 p. , At head of title: Pennsylvania Geological Survey, Fourth series. | On cover: Commonwealth of Pennsylvania. Department of internal affairs. 23 cm..

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Guidebook to the geology about Pittsburgh,

By Leighton, Henry,.
Harrisburg, Pa., Department of internal affairs, Topographic and geologic survey, 1939 .
35 p. , At head of title: Pennsylvania Geological survey, Fourth series. | On cover: Commonwealth of Pennsylvania. Department of internal affairs. 23 cm..

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