PT - JOURNAL ARTICLE AU - Richard Hansen TI - Watermarks at the Nature Center AID - 10.3368/lj.17.Special_Issue.21 DP - 1998 Jan 01 TA - Landscape Journal PG - 21--23 VI - 17 IP - Special Issue 4099 - http://lj.uwpress.org/content/17/Special_Issue/21.short 4100 - http://lj.uwpress.org/content/17/Special_Issue/21.full