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
Image Rare Books De revolutionibus orbium coelestium De revolutionibus orbium coelestium [On the Revolutions of the Heavenly Spheres]. 6, 196 numbered leaves, tables, diagrams. View Item
