Land use Planning 127 Environmental aspects 80 Congresses 58 Agriculture 42 Economic aspects 38 Regional planning 36 més ... Law and legislation 33 Management 29 Sustainable development 23 Land tenure 22 City planning 21 Natural resources 19 Periodicals 17 Real estate development 17 Case studies 16 Data processing 16 Geographic information systems 15 Land use, Rural 15 Remote sensing 15 Environmental protection 14 Government policy 12 Landscape architecture 12 Landscape protection 11 Addresses, essays, lectures 10 Conservation of natural resources 10 Ecology 10 Soils 10 Cities and towns 9 Information storage and retrieval systems 9 menys ...