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41by Kertis, Carla A.Subjects: “...Coal mines and mining Pennsylvania Indiana County Safety measures....”
Published 1985
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42by Kertis, Carla A.Subjects: “...Coal mines and mining Pennsylvania Indiana County Safety measures....”
Published 1985
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43by Chekan, G. J. (Gregory J.)Subjects: “...Coal mines and mining Pennsylvania....”
Published 1986
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44Published 1849Subjects: “...Coal mines and mining Pennsylvania....”
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45by Taylor, Richard C. (Richard Cowling), 1789-1851Subjects: “...Coal mines and mining Pennsylvania....”
Published 1840
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46by Schaefer, Donald FredSubjects: “...Coal mines and mining Pennsylvania History....”
Published 1977
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47Published 1984Subjects: “...Coal mines and mining Pennsylvania....”
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48Published 1849Subjects: “...Coal mines and mining Pennsylvania....”
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49Published 1849Subjects: “...Coal mines and mining Pennsylvania....”
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50by Hoffman, John N.Subjects: “...Coal mines and mining Pennsylvania History....”
Published 1972
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51Published 1981Subjects: “...Coal mines and mining Pennsylvania Somerset County Safety measures....”
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52by Fesak, George M.Subjects: “...Coal mines and mining Pennsylvania Accidents....”
Published 1985
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53Published 1913Subjects: “...Coal mines and mining Pennsylvania....”
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54Published 1875Subjects: “...Coal mines and mining Pennsylvania....”
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55by Eavenson, Howard Nicholas, 1873-1953Subjects: “...Coal mines and mining Pennsylvania Pittsburgh....”
Published 1938
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56by Palladino, GraceSubjects: “...Coal mines and mining Pennsylvania History 19th century....”
Published 1990
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57by Palladino, GraceSubjects: “...Coal mines and mining Pennsylvania History 19th century....”
Published 1990
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58by Wallace, Anthony F. C., 1923-Subjects: “...Coal mines and mining Pennsylvania Saint Clair (Schuylkill County) History 19th century....”
Published 1987
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59by Davies, Edward J., II, 1947-Subjects: “...Coal mines and mining Pennsylvania Wilkes-Barre Region History....”
Published 1985
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60Published 1992Subjects: “...Coal mines and mining Pennsylvania History....”
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