TY  - RPRT
TI  - Trends in nutrients
AU  - A.L. Heathwaite
AU  - P.J. Johnes
AU  - N.E. Peters
PY  - 1996
DO  - 10.1002/(sici)1099-1085(199602)10:2<263::aid-hyp441>3.0.co;2-k
UR  - https://pubs.usgs.gov/publication/70019344
ID  - 70019344
ER  -