共 50 条
- [31] Community centres - In relation to public health and public welfare LANCET, 1938, 1 : 1070 - 1073
- [34] The Conservation of Natural Resources in the United States AMERICAN ECONOMIC REVIEW, 1911, 1 (01): : 83 - 86
- [35] SMITH,GH - CONSERVATION OF NATURAL RESOURCES CALIFORNIA FISH AND GAME, 1966, 52 (04): : 304 - +
- [36] The Conservation of Natural Resources in the United States BULLETIN OF THE AMERICAN GEOGRAPHICAL SOCIETY OF NEW YORK, 1911, 43 (04): : 295 - 296
- [37] Our Natural Resources and their conservation. ANNALES DE GEOGRAPHIE, 1937, 46 (262): : 419 - 419