RT Journal Article SR Electronic T1 On the composition of the labradorite rocks of Waterville, New Hampshire JF American Journal of Science JO Am J Sci FD American Journal of Science SP 48 OP 50 DO 10.2475/ajs.s3-3.13.48 VO s3-3 IS 13 A1 Dana, Edward Salisbury YR 1872 UL http://www.ajsonline.org/content/s3-3/13/48.abstract AB