TY - BOOK AU - Crawford, David, ed. TI - Instrumentation in Astronomy IV T2 - Proceedings of SPIE; V. 0331 SN - 9780892523665 (Print) PY - 1982/// CY - Washington, USA PB - SPIE UR - https://www.spiedigitallibrary.org/conference-proceedings-of-spie/0331 ER -