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- 1998
-
Mark
Changes in biologically active ultraviolet radiation reaching the Earth's surface
(
- Contribution to journal › Article
-
Mark
Effects of increased solar ultraviolet radiation on terrestrial ecosystems
(
- Contribution to journal › Article
- 1995
-
Mark
Changes in ultraviolet-radiation reaching the earths surface
(
- Contribution to journal › Article
-
Mark
Effects of increased solar ultraviolet-radiation on terrestrial plants
(
- Contribution to journal › Article