PT - JOURNAL ARTICLE AU - Robert Higgs TI - Before bureaucracy: Environmental spillovers DP - 2006 Mar 01 TA - Journal of Soil and Water Conservation PG - 45A VI - 61 IP - 2 4099 - http://www.jswconline.org/content/61/2/45A.short 4100 - http://www.jswconline.org/content/61/2/45A.full