Dyfyniad APA

Cushing, D. . H. Uses of echo sounding for fishermen. Her Majesty stationery office.

Dyfyniad Arddull Chicago

Cushing, D H. Uses of Echo Sounding for Fishermen. London: Her Majesty stationery office.

Dyfyniad MLA

Cushing, D H. Uses of Echo Sounding for Fishermen. Her Majesty stationery office.

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