RT Journal Article SR Electronic T1 The age of a monazite crystal from Portland, Connecticut JF American Journal of Science JO Am J Sci FD American Journal of Science SP 327 OP 333 DO 10.2475/ajs.s5-23.136.327 VO s5-23 IS 136 A1 Clarence Norman Fenner YR 1932 UL http://www.ajsonline.org/content/s5-23/136/327.abstract AB