00597nam 2200193 450 2707623http://id.bnportugal.gov.pt/bib/porbase/270762320041105105408.01-55591-902-2esac002.iso/18-12-2015/6911000691220041104d1992 k y 0103 baengGBEnvironmental interpretation<a >practical guide for people with big ideas and small budgetsGolden, ColoradoFulcrum Publishing1992XXVI, 456 p.il.23 cm551.5BNporHamSam H.PTESACRPC