共 50 条
[1]
NONFEDERAL WILDERNESS, WILD, AND NATURAL AREAS IN THE UNITED-STATES - A SURVEY
[J].
OUTDOOR RECREATION BENCHMARK 1988 : PROCEEDINGS OF THE NATIONAL OUTDOOR RECREATION FORUM,
1989, 52
:319-335
[10]
A database of georeferenced nutrient chemistry data for mountain lakes of the Western United States
[J].
Scientific Data,
4