title: Losing the dark: a case for a national policy on land conservation.
authors: Robert F
authors: RF
authors: Baldwin
authors: Stephen C
authors: SC
authors: Trombulak
mesh_terms: D000383:Agriculture; D003247:Conservation of Natural Resources / Q000331:legislation & jurisprudence*; D003710:Demography; D006801:Humans; D010067:Ownership; D011640:Public Policy; D014481:United States