Applied nonlinear optics / Frits Zernike and John E. Midwinter. Zernike, Frits, 1930- Midwinter, John E., joint author. Nonlinear optics. QC446.2 .Z47 535 ZEA Includes bibliographical references and index New York, Wiley [1973] [1973] 1973 Text xi, 199 p. eng Wiley series in pure and applied optics