Semiconductor materials for optoelectronics and LTMBE materials proceedings of Symposium A on Semiconductor Materials for Optoelectronic Devices, OEICs, and Photonics and Symposium B on Low Temperature Molecular Beam Epitaxial III-V Materials: Physics and Applications of the 1993 E-MRS Spring Conference, Strasbourg, France, May 4-7, 1993 - Hirtz, J. P. (European Materials Research Society symposia proceedings, 1993)