Dyfyniad APA

Emerson, W. K. The American Museum of Natural History guide to shells. Land, freshwater, and marine, from Nova Scotia to Florida.

Dyfyniad Arddull Chicago

Emerson, William K. The American Museum of Natural History Guide to Shells. Land, Freshwater, and Marine, from Nova Scotia to Florida.

Dyfyniad MLA

Emerson, William K. The American Museum of Natural History Guide to Shells. Land, Freshwater, and Marine, from Nova Scotia to Florida.

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