1999 edition can be found at PELL with the call number QL9 C66 1999, and is also available as an eBook (see below entry). Covers all aspects of zoology, from behavioral ecology and conservation biology to cytology and taxonomy.

Comprehensive reference work on all aspects of the study of animals. Contains over 5,000 entries.

3 vol. Covers communication, learning, sexual selection, navigation, and the history of the field, as well as emerging topics in cognition, animal welfare, conservation, and applications of animal behavior.

Describes 400 zoos worldwide, including a number of species in each. Access by zoo and by species.

17 vol. Classical major encyclopedia of animals. Each volume has basic biology of the group covered, and full accounts of many species. Very well illustrated.

Publishes articles on zoos and news about species. v.1(1959)-v.40(2006). Missing volume 39. Continued online (see listing below)

Published by The Zoological Society of London as a service to zoos around the world. The International Zoo Yearbook is an international forum for the exchange of information on the role of zoos in the conservation of biodiversity, species and habitats.

Details the ecology and wildlife of the continents, oceans, and poles, and includes up-to-date conservation and preservation data and the human impact on the world's ecosystems.