"Landgebruik." . . . . . . . . . . . . . . . . . . . . . . . . . . . "Metropolitan open space and natural process" . "Metropolitan open space and natural process"@en . "\"Sponsored by the United States Department of Housing and Urban Development, the State of New Jersey, Department of Community Affairs, the Commonwealth of Pennsylvania, State Planning Board.\"" . "Pianificazione regionale - Filadelfia." . . "Stedelijke ontwikkeling." . . "Aménagement du territoire Pennsylvanie Philadelphie." . . "Milieubeleid." . . . .