Grego, P. (2008). Venus and Mercury, and how to observe them. Springer.
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No s'ha pogut copiar
Cita Chicago (17th ed.)
Grego, Peter. Venus and Mercury, and How to Observe Them. New York: Springer, 2008.
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No s'ha pogut copiar
Cita MLA (9th ed.)
Grego, Peter. Venus and Mercury, and How to Observe Them. Springer, 2008.
Copiat
No s'ha pogut copiar
Atenció: Aquestes cites poden no estar 100% correctes.