TY  - BOOK
AU  - Haynes,Kingsley E.
AU  - Fotheringham,A.Stewart
TI  - Gravity and spatial interaction models
T2  - Scientific geography series
SN  - 0-8039-2544-1
AV  - HB199 H39
PY  - 1984///
CY  - Beverly Hills, Calif.
PB  - Sage
N1  - Incluye bibliografia
ER  -