RT Journal Article SR Electronic T1 Notes on the volcanic rocks of the republic of Salvador, Central America JF American Journal of Science JO Am J Sci FD American Journal of Science SP 26 OP 31 DO 10.2475/ajs.s3-32.187.26 VO s3-32 IS 187 A1 Hague, Arnold A1 Iddings, J. P. YR 1886 UL http://www.ajsonline.org/content/s3-32/187/26.abstract AB