Selected References |
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| Books | |
| History | |
| Censuses, threats, conservation | |
| Ecology, feeding, nesting, demography, life history | |
| Behaviour | |
| Birth, mother-infant relationship, ontogeny | |
| Evolution, taxonomy, genetics | |
| Anatomy | |
| Diseases | |
| Physiology | |
| Zoos | |
| Rain forests in Africa, politics, economy | |
| Tourism | |
| Virunga Volcanoes | |
| Cross-River region | |
| Itombwe | |
| Mt. Tshiaberimu | |
| Kahuzi-Biega | |
| Bwindi | |
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