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→Externí odkazy
| Řádek 37: | Řádek 37: | ||
http://en.wikipedia.org/wiki/Trophic_level | http://en.wikipedia.org/wiki/Trophic_level | ||
http://www.palaeos.org/Trophic_structure | http://www.palaeos.org/Trophic_structure | ||
http://www.deer.rr.ualberta.ca/library/guild/trophic_structure.htm | |||
=== Literatura === | === Literatura === | ||