共 50 条
- [1] NATIONAL REPORT OF THE UNITED-STATES-OF-AMERICA [J]. PHOTOGRAMMETRIC ENGINEERING AND REMOTE SENSING, 1980, 46 (12): : 1525 - 1530
- [2] LEGISLATIVE AND ADMINISTRATIVE DEVELOPMENTS - UNITED-STATES-OF-AMERICA AND TERRITORIES [J]. JOURNAL OF THE COPYRIGHT SOCIETY OF THE USA, 1990, 38 (02): : 101 - 105
- [3] VISIBILITY MEASUREMENTS IN NATIONAL-PARKS IN THE WESTERN UNITED-STATES [J]. JOURNAL OF THE AIR POLLUTION CONTROL ASSOCIATION, 1984, 34 (09): : 899 - 904
- [7] UNITED-STATES-OF-AMERICA [J]. INTERNATIONAL JOURNAL OF POWDER METALLURGY, 1989, 25 (02): : 153 - 156
- [8] NATIONAL ATLAS OF UNITED-STATES-OF-AMERICA - GERLACH,AC [J]. SPECIAL LIBRARIES, 1972, 63 (03) : 158 - 160
- [9] PROPOSALS, ABOLISHMENTS, AND CHANGING STANDARDS FOR UNITED-STATES NATIONAL-PARKS [J]. HISTORIAN, 1991, 54 (01): : 49 - 64