Merrick, H. H. Lands and peoples. The world in color. Volume 6: Canada, the United States. New York: Grolier.
Παραπομπή Chicago StyleMerrick, Helen Hynson. Lands and Peoples. The World in Color. Volume 6: Canada, the United States. New York: Grolier.
Παραπομπή MLAMerrick, Helen Hynson. Lands and Peoples. The World in Color. Volume 6: Canada, the United States. New York: Grolier.
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