John B. Murray; JB Muller; JP Neukum; G. Werner; SC Van Gasselt; S. Hauber; E. Markiewicz; WJ Head Jw 3rd; BH Foing;; et al. (17-03-2007). "Evidence ... for a frozen sea close to Mars' equator". Nature434 (7031): 352–355. Bibcode:2005Natur.434..352M. PMID15772653. doi:10.1038/nature03379.
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John B. Murray; JB Muller; JP Neukum; G. Werner; SC Van Gasselt; S. Hauber; E. Markiewicz; WJ Head Jw 3rd; BH Foing;; et al. (17-03-2007). "Evidence ... for a frozen sea close to Mars' equator". Nature434 (7031): 352–355. Bibcode:2005Natur.434..352M. PMID15772653. doi:10.1038/nature03379.
John B. Murray; JB Muller; JP Neukum; G. Werner; SC Van Gasselt; S. Hauber; E. Markiewicz; WJ Head Jw 3rd; BH Foing;; et al. (17-03-2007). "Evidence ... for a frozen sea close to Mars' equator". Nature434 (7031): 352–355. Bibcode:2005Natur.434..352M. PMID15772653. doi:10.1038/nature03379.