51774143
9780666328632
Ehlers, E. is the author of 'Reports of the Results of Dredging, Vol. 31 : Under the Direction of L. F. Pourtal�s, During the Years 1868-1870, and of Alexander Agassiz, in the Gulf of Mexico (1877-1878), and in the Caribbean Sea (1878-79), in the U. S. Coast Survey Steamer Blake; R', published 2018 under ISBN 9780666328632 and ISBN 0666328633.
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