8Baily R G, Collins F, Zoltai S C. Ecological regionalization in Canada and the United States[J]. C, eoforum, 1985,6(3) :265-275. 被引量：1
9Omernik J M. Ecoregions of the conterminous United States (Map supplements) [J]. Annals of the Association of American Geo-graphers,1987,77(1):l18-125. 被引量：1
10Elder J. The big picture: Sierra club critical ecoregions program [J]. Sierra, 1994,79 (2) : 52-57. 被引量：1
