@article{oai:minpaku.repo.nii.ac.jp:00002639,
 author = {Campbell, Alec and Main, Michael and Hitchcock, Robert K.},
 journal = {Senri Ethnological Studies},
 month = {Dec},
 pages = {183--228},
 title = {Land, Livestock, and Labor in Rural Botswana : The Western Sandveld Region of Central District as a Case Study},
 volume = {70},
 year = {2006}
}