Penetration of ultraviolet radiation in streams of eastern Pennsylvania: Topographic controls and the role of suspended particulates.Published in:Aquatic Sciences, 2009, v. 71, n. 2, p. 189By:Donald Morris;Frank Pazzaglia;Stephen PetersPublication type:Article
SUPPLEMENTAL GEOGRAPHY.Published in:Journal of Education, 1895, v. 42, n. 11, p. 198Publication type:Article