Tellier, Luc-Normand2021-02-172021-02-171975http://hdl.handle.net/11693/74954Journal of Regional Science -- December 1975 -- pages 317-321.5 pages; 317-321EnglishPhysicsProblems, exercises, etcCriticism and interpretationGravityMathematical modelsHuman interactionCON.K3987CuttingHCONTURK0003987