TY  - RPRT
TI  - Assessment of soil calcium status in red spruce forests in the northeastern United States
AU  - G.B. Lawrence
AU  - M.B. David
AU  - S.W. Bailey
AU  - W.C. Shortle
PY  - 1997
DO  - 10.1023/a:1005790130253
UR  - https://pubs.usgs.gov/publication/70020046
ID  - 70020046
ER  -