00403nam a22001217a 450000500170000000800410001702000150005805000180007310000430009124500840013426000370021830000260025520260407110524.0260407b        |||||||| |||| 00| 0 eng d  a0721683878  aQB145.S5 1973  aSmith P.V. Elske and Jacobs C. Kenneth  aIntroductory astronomy and astrophysicscElske V.P. Smith and Kenneth C. Jacobs  aUSAbW.B. saunders companyc1973  axii, ills; 564p.bHbk