A. B. Kempe, On the Geographical Problem of the Four Colours, American Journal of Mathematics, Vol. 2, No. 3 (Sep., 1879), pp. 193-200 ...

This is a preview. Log in through your library . Journal Information The Review of Economics and Statistics is an 84-year old general journal of applied (especially quantitative) economics. Edited at ...

Language Arts is a professional journal for elementary and middle school teachers and teacher educators. It provides a forum for discussions on all aspects of language arts learning and teaching, ...

Mladen Bestvina, Michael Handel, Train Tracks and Automorphisms of Free Groups, Annals of Mathematics, Vol. 135, No. 1 (Jan., 1992), pp. 1-51 ...