Our natural resources and their conservation
Parkins, A. E Whitaker, J. R
Our natural resources and their conservation - 2 ed. - John Wiley & Sons 1947 - 647 p. tabls., grafs., maps., ilus.
The conservation movement in America, Atwood, Wallace W The public domain and its disposal, Visher, Stephen S The soils of the United States, Wolfanger, Louis A Soils erosion and its prevention, Bennett H. H Tree Crops, Russell Smith, J Utilization and conservation of our arid and semiarid lands, Brown, Ralph H The problem of our grasslands, Shelford, V. E, Hanson, H. C Reclamation of wet and overflow lands, Miller, George J The agricultural prospect, Baker, O. E Our forests, past and present Essential measures in forest conservation, Whitaker, J. R Water supply for domestic and industrial uses, Brown, Robert M Water power and its conservation, Williams, Frank Our waterways and their utilization, Parkins, A. E Floods and flood control, Smith, Guy-Harold Our mineral treasures, Hass, William H The mineral fuels, Bengtson, Nels A Conservation of natural resources in relation to the manufacturing industry, Strong, Helen M Conservation of Wildlife, Shelford, V. E Fisheries for the future, Martin, H. H Recreational resources, Prophet, Edward C The conservation of man, Huntington, Ellsworth State and local planning, Durand, Loyal National regional planning in resource use, Renner, Geo T
Inglés
EROSIÓN DEL SUELO/prevención & control
CONSERVACIÓN DE TIERRAS
REHABILITACIÒN DE TIERRAS
ESTADOS UNIDOS
Our natural resources and their conservation - 2 ed. - John Wiley & Sons 1947 - 647 p. tabls., grafs., maps., ilus.
The conservation movement in America, Atwood, Wallace W The public domain and its disposal, Visher, Stephen S The soils of the United States, Wolfanger, Louis A Soils erosion and its prevention, Bennett H. H Tree Crops, Russell Smith, J Utilization and conservation of our arid and semiarid lands, Brown, Ralph H The problem of our grasslands, Shelford, V. E, Hanson, H. C Reclamation of wet and overflow lands, Miller, George J The agricultural prospect, Baker, O. E Our forests, past and present Essential measures in forest conservation, Whitaker, J. R Water supply for domestic and industrial uses, Brown, Robert M Water power and its conservation, Williams, Frank Our waterways and their utilization, Parkins, A. E Floods and flood control, Smith, Guy-Harold Our mineral treasures, Hass, William H The mineral fuels, Bengtson, Nels A Conservation of natural resources in relation to the manufacturing industry, Strong, Helen M Conservation of Wildlife, Shelford, V. E Fisheries for the future, Martin, H. H Recreational resources, Prophet, Edward C The conservation of man, Huntington, Ellsworth State and local planning, Durand, Loyal National regional planning in resource use, Renner, Geo T
Inglés
EROSIÓN DEL SUELO/prevención & control
CONSERVACIÓN DE TIERRAS
REHABILITACIÒN DE TIERRAS
ESTADOS UNIDOS