Quartz crystals for electrical circuits, their design and manufacture, by Raymond A. Heising ... Heising, Raymond Alphonsus, 1888- comp. Quartz. Pyroelectricity. Oscillators, Electric. QC595 .H4 548.8 HEQ Articles by various authors. Bibliography: p. 410-411. New York, D. Van Nostrand company, inc., 1946. 1946. 1946 Text vii, 563 p. eng