TY  - JA
AU  - Caldwell,M.M.
AU  - Billings,W.D.
AU  - Robberecht,R.
TI  - A steep latitudinal gradient of solar ultraviolet-B radiation in the arctic-alpine life zone [flora and vegetation]
SN  - 0012-9658
U1  - 82-711817 
PY  - 1980///
KW  - Plant ecology
N1  - ill. 23 ref
T2  - Ecology
ER  -