RT Journal Article SR Electronic T1 On the relative accuracy of different methods of determining the solar parallax JF American Journal of Science JO Am J Sci FD American Journal of Science SP 375 OP 394 DO 10.2475/ajs.s3-22.131.375 VO s3-22 IS 131 A1 W. Harkness YR 1881 UL http://www.ajsonline.org/content/s3-22/131/375.abstract AB