共 50 条
- [41] WATER QUALITY - AGRICULTURAL CHEMICALS AND OUR WATER RESOURCES AGRICULTURAL ENGINEERING, 1970, 51 (06): : 358 - &
- [45] Our Natural Resources and their Conservation, 2nd edition SCOTTISH GEOGRAPHICAL MAGAZINE, 1939, 55 (06): : 345 - 345
- [46] NATIONAL DEFENSE AND THE COMPLETE DEVELOPMENT OF OUR HUMAN RESOURCES SCHOOL AND SOCIETY, 1951, 73 (1885): : 65 - 68
- [49] REORIENTATION OF OUR SALINE WATER RESOURCES THINKING TRANSACTIONS-AMERICAN GEOPHYSICAL UNION, 1969, 50 (04): : 150 - &