TY - BOOK AU - Fagan, William, ed. TI - Holographic Optical Security Systems T2 - Proceedings of SPIE; V. 1509 SN - 9780819406187 (Print) PY - 1991/// CY - Washington, USA PB - SPIE UR - https://www.spiedigitallibrary.org/conference-proceedings-of-spie/1509 ER -