Image Rare Books 1923 Report of Hydraulic Power Committee, Technical National Section : including report on Penstock design, prepared jointly with Pacific Coast Electrical Association. Cover title. ""Presented at the 46th Convention of the National Electric Light Association, Commodore Hotel, New York City, June 4 to 8, 1923."" View Item
Image Rare Books Chronology of chemistry in the Lehigh Valley. Chronology of chemistry in the Lehigh Valley / R.D. Billinger, [typescript], 1969. 501 leaves ; 28 cm. View Item