Variant of CIP 2016 - Alternative primary groupings
- 06 - Physical and life sciences and technologies
- 26. - Biological and biomedical sciences
- 26.13 - Ecology, evolution, systematics and population biology
- 26.1301 - Ecology
- 26.1302 - Marine biology and biological oceanography
- 26.1303 - Evolutionary biology
- 26.1304 - Aquatic biology/limnology
- 26.1305 - Environmental biology
- 26.1306 - Population biology
- 26.1307 - Conservation biology
- 26.1308 - Systematic biology/biological systematics
- 26.1309 - Epidemiology
- 26.1310 - Ecology and evolutionary biology
- 26.1399 - Ecology, evolution, systematics and population biology, other
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