TY  - BOOK
AU  - Tamm,Carl Olof
TI  - Nitrogen in terrestrial ecosystems: questions of productivity, vegetational changes and ecosystem stability 
SN  - 354051807X
PY  - 1991///
CY  - Berlin
PB  - Springer-Verlag
KW  -  Nitrogen cycles
KW  -  Biotic communities
KW  -  Plants, Effect of nitrogen on
KW  -  Ecology
KW  -  Forest ecology
ER  -