ANDERSON, R. C., S. L. JONES, AND R. SWIGART (Department of Biological Sciences-4120, Illinois State University, Normal, IL 61790-4120). Modifying distance methods to improve estimates of historical tree density from General Land Office survey records. J. Torrey Bot. Soc. 133: 449–459. 2006.—Distance sampling methods are widely applied to witness tree data from General Land Office (GLO) survey ...