PT - JOURNAL ARTICLE AU - Dean, George W. TI - Longitude determination across the continent AID - 10.2475/ajs.s3-2.12.441 DP - 1871 Dec 01 TA - American Journal of Science PG - 441--448 VI - s3-2 IP - 12 4099 - http://www.ajsonline.org/content/s3-2/12/441.short 4100 - http://www.ajsonline.org/content/s3-2/12/441.full SO - Am J Sci1871 Dec 01; s3-2