Hayler, W. B., Keever, J. M., & Seiler, P. M. (1981). American merchant seaman's manual: For seamen by seamen (6th ed.). Maryland: Cornell Maritime Press.
Παραπομπή Chicago StyleHayler, William B., John M. Keever, and Paul M. Seiler. American Merchant Seaman's Manual: For Seamen By Seamen. 6th ed. Maryland: Cornell Maritime Press, 1981.
Παραπομπή MLAHayler, William B., John M. Keever, and Paul M. Seiler. American Merchant Seaman's Manual: For Seamen By Seamen. 6th ed. Maryland: Cornell Maritime Press, 1981.
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