SpringerLink (Online service) & Gainer, M. K. (2007). Real astronomy with smal telescopes: Step-by-step activities for discovery. Springer-Verlag London Limited.
Citace podle Chicago (17th ed.)SpringerLink (Online service) a Michael K. Gainer. Real Astronomy with Smal Telescopes: Step-by-step Activities for Discovery. London: Springer-Verlag London Limited, 2007.
Citace podle MLA (8th ed.)SpringerLink (Online service) a Michael K. Gainer. Real Astronomy with Smal Telescopes: Step-by-step Activities for Discovery. Springer-Verlag London Limited, 2007.
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