Geograf amerykański.

Map generalization : making rules for knowledge representation / ed. by Barbara P. Buttenfield, Robert B. McMaster. - Harlow, 1991. Obwol. (Assistant professor of geography at the National Center for Geographic Information and Analysis at SUNY-Buffalo)

LCA online

http://www.emich.edu/visit/Team_members/barb.htm

BNF-NA