Gravity and spatial interaction models
Haynes ,Kingsley E Ofthering ,A stewart Thrall ,grant Ian, ed.,
Gravity and spatial interaction models - London sage publications 1984 - 86 p.; 20cm - Scientific geography series .
803923260
Geography -Mathematical models
Gravity model
Gravity and spatial interaction models - London sage publications 1984 - 86 p.; 20cm - Scientific geography series .
803923260
Geography -Mathematical models
Gravity model