TY  - BOOK
AU  - Beckmann,Martin J.
AU  - Puu,Tönu
TI  - Spatial economics: density, potential, and flow 
SN  - 0444877711 (Elsevier Science Pub. Co.)
U1  - 330.028 
PY  - 1985///
CY  - Amsterdam, New York, New York, N.Y., U.S.A.
PB  - North-Holland, Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co.
KW  - Regional economics
KW  - Space in economics
N1  - Includes indexes; Bibliography: p. [258]-266
ER  -