Bibliografisk träff 2010-06-17 Effects of chronic ammonium sulfate treatment on the forest at the Bear Brook Watershed in Maine. Elvir JA, Wiersma GB, Bethers S, Kenlan P. Environ Monit Assess · research support, non-u.s. gov't; research support, u.s. gov't, non-p.h.s.; journal article · DOI 10.1007/s10661-010-1523-3