Rivers as Regional Bonds: The Columbia-Snake Example. Ullman, E. L. Geographical Review, 41(2):210--225, April, 1951. ArticleType: research-article / Full publication date: Apr., 1951 / Copyright © 1951 American Geographical Society
Rivers as Regional Bonds: The Columbia-Snake Example [link]Paper  bibtex   
@article{ullman_rivers_1951,
	title = {Rivers as {Regional} {Bonds}: {The} {Columbia}-{Snake} {Example}},
	volume = {41},
	issn = {00167428},
	url = {http://www.jstor.org/stable/211020},
	number = {2},
	journal = {Geographical Review},
	author = {Ullman, Edward L.},
	month = apr,
	year = {1951},
	note = {ArticleType: research-article / Full publication date: Apr., 1951 / Copyright © 1951 American Geographical Society},
	pages = {210--225}
}

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