HYPOTHESIS ABOUT GATEWAY CITIES

[1] BERRY TS, 1943, HARVARD ECONOMIC STU, V74, P32

[2] BROWN RH, 1954, HISTORICAL GEOGRAPHY

[3] BURGHARDT A, 1959, ANN ASSOC AM GEOGR, V49, P315

[4] CHRISTALLER W, 1966, CENTRAL PLACES SO GE, P49

[5] FRASER WB, 1967, CALGARY, P2

[6] GRIFFIN P, 1962, ANGLO AM REGIONAL GE, P225

[7] HARRIS CD, 1945, AM ACADEMY POLITICAL, V242, P10

[8] HEALY WJ, 1927, WINNIPEGS EARLY DAYS, P17

[9] THUNEN,V ISOLATED STATE AND AREA AROUND ADDIS-ABABA, ETHIOPIA [J]. ANNALS OF THE ASSOCIATION OF AMERICAN GEOGRAPHERS, 1969, 59 (02) : 308 - 323

[10] JEFFERSON M, 1931, GEOGR REV, V21, P435

[1] BERRY TS, 1943, HARVARD ECONOMIC STU, V74, P32

[2] BROWN RH, 1954, HISTORICAL GEOGRAPHY

[3] BURGHARDT A, 1959, ANN ASSOC AM GEOGR, V49, P315

[4] CHRISTALLER W, 1966, CENTRAL PLACES SO GE, P49

[5] FRASER WB, 1967, CALGARY, P2

[6] GRIFFIN P, 1962, ANGLO AM REGIONAL GE, P225

[7] HARRIS CD, 1945, AM ACADEMY POLITICAL, V242, P10

[8] HEALY WJ, 1927, WINNIPEGS EARLY DAYS, P17

[9] THUNEN,V ISOLATED STATE AND AREA AROUND ADDIS-ABABA, ETHIOPIA [J]. ANNALS OF THE ASSOCIATION OF AMERICAN GEOGRAPHERS, 1969, 59 (02) : 308 - 323

[10] JEFFERSON M, 1931, GEOGR REV, V21, P435