@book{29161,
	author = {Schlossberg, Howard, ed.},
	title = {Nonlinear Optical Properties of Materials},
	publisher = {SPIE},
	year = {1990},
	series = {Proceedings of SPIE; V. 1148},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/1148}
}