PT - JOURNAL ARTICLE AU - Williams, Charles E. TI - A Durable Seed Trap for Measuring Seed Rain in Forests AID - 10.3368/er.8.1.31 DP - 1990 Jun 20 TA - Ecological Restoration PG - 31--32 VI - 8 IP - 1 4099 - http://er.uwpress.org/content/8/1/31.short 4100 - http://er.uwpress.org/content/8/1/31.full