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Studies of highway development and geographic change : William L. Garrison; Brian J. L. Berry; Duane F. Marble; John D. Nystuen; Richard L. Morrill. Publ. in coop. with the Bureau of Public Roads of the Department of Commerce and the Washington State Highway Commission
Garrison, William L., (1959)
Die Bestimmung einiger fundamentaler Raumbegriffe
Nystuen, John D., (1970)
Identification of some fundamental spatial concepts
Nystuen, John D., (1968)