Peck, Frederick Buritt, 1860-1925. Preliminary report on the talc and serpentine of Northampton County and the Portland cement materials of the Lehigh District, by Frederick B. Peck. - Harrisburg, C. E. Aughinbaugh, 1911. - 66 p. plates, maps (1 fold. in pocket) 24 cm. LCCN: gs 12000486 Subjects--Topical Terms: Serpentine.Talc.Portland cement. LC Class. No.: GA61.P4 / A5 no. 5