Compendium of Practical Astronomy: Volume 3: Stars and Stellar Systems Editat de Günter D. Roth et al. 6 oct 1994 Paperback Preț: 373.08 lei 6-8 săpt.
Double Stars Geophysics and Astrophysics Monographs, nr. 15 Autor W.D. Heintz 31 aug 1978 Hardback Preț: 607.69 lei 714.92 lei 6-8 săpt. -15%