Lauenroth W K Ed. Effects of S02 on a grassland: a case study in the Northern great plains of the United States Lauenroth W K Ed.; Preston Eric M Ed. - 2 - New York Springer Verlag 1984 - xi, 207p. cm. - Ecological studies; 45 . Bibliography 177-190p Standard No.: 49779 Source: Textual Subjects--Topical Terms: Plant ecologyBotany Dewey Class. No.: I:5:33E16160, M4