![Sample our Geography journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/5937/TOC-Subject-Sample-2021-Geography.jpg"})
Editor's note: This article originally appeared in Mobility and Transport for Elderly and Handicapped Persons, edited by Norman Ashford, William G. Bell and Tom A. Rich; New York 1982, Gordon and Breach Science Publishers Ltd. A number of typographical errors in mathematical formulations of the original paper are corrected here.
Notes
Editor's note: This article originally appeared in Mobility and Transport for Elderly and Handicapped Persons, edited by Norman Ashford, William G. Bell and Tom A. Rich; New York 1982, Gordon and Breach Science Publishers Ltd. A number of typographical errors in mathematical formulations of the original paper are corrected here.