RT Journal Article SR Electronic T1 A sketch of the life and scientific services of John Evans, M.D., U. S. geologist for Oregon and Washington territories, and of the U. S. Chiriqui exploring expedition JF American Journal of Science JO Am J Sci FD American Journal of Science SP 311 OP 318 DO 10.2475/ajs.s2-32.96.311 VO s2-32 IS 96 A1 Jackson, Charles T. YR 1861 UL http://www.ajsonline.org/content/s2-32/96/311.abstract AB