Sonar of Penguins and Fur Seals.

[San Francisco, Calif.: California Academy of Sciences, 1969]. Reprinted for private circulation from Proceedings of the California Academy of Sciences, Fourth Series, Vol. XXXVI, No. 13, pp. 363-380, 8 figs. April 10, 1969. Very good in staple-bound paper wraps. Item #12-1220

Price: $20.00

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