TY  - JOUR
A1  - Huff, D.L.
A1  - Jenks, G.F.
T1  - A graphic interpretation of the friction of distance in gravity models
Y1  - 2015
DO  - 10.1111/j.1467-8306.1968.tb01670.x
UR  - https://doi.org/doi:10.1111/j.1467-8306.1968.tb01670.x
VL  - 58
IS  - 4

ER  -