TY - BOOK AU - Roth, Gunter Dietmar TI - Compendium of practical astronomy Vol.1:Instrumentation and techniques SN - 3-540-56273-7 PY - 1994/// CY - Berlin PB - Springer-Verlag KW - Astronomy--handbooks,manuals,etc N1 - Translated by Harry J. Augensen and Wulff D.Heintz ER -