[A multilevel analysis of population and deforestation in the Sierra de Lacandon National Park, Peten, Guatemala] [0.03%]
[对危地马拉佩腾省拉卡坚国家公园人口与森林砍伐的多级分析]
David L Carr,Felipe Murtinho,William Ky Pan et al.
David L Carr et al.
The paper examines depopulation factors associated with deforestation in the Natural park of the Sierra de Lacandón (PNSL), using multilevel regresión analysis.More than 10 percent of the park area has been deforested since the mid 1980s ...
Douglas S Massey,Karen A Pren
Douglas S Massey
At the end of the 1950s, the United States permitted the entry of a half million Mexican migrants per year, of which 450.000 entered with temporary work visa and 50.000 as permanent residents. By the mid-1970s, however, changes in U.S. migr...
A M Solana,A Pascual De Sans
A M Solana
[The role of migration in population growth in Catalonia, 1880-1980] [0.03%]
1880至1980年移民在加泰罗尼亚人口增长中的作用
A M Cabre
A M Cabre
"This article is based on the author's recent study: 'The reproduction of Catalan cohorts, 1856-1960', conceived in answer to the book by J. A. Vandellos, [titled] Catalunya, poble decadent. The main conclusions are that, in contradiction t...