TY - BOOK AU - Watkins, Wendell, ed. TI - Characterization, Propagation, and Simulation of Sources and Backgrounds T2 - Proceedings of SPIE; V. 1486 SN - 9780819405951 (Print) PY - 1991/// CY - Washington, USA PB - SPIE UR - https://www.spiedigitallibrary.org/conference-proceedings-of-spie/1486 ER -