Encyclopedia of Biodiversity "Brings together, for the first time, a study of the dimensions of diversity...Major themes of the work include the evolution of biodiversity, systems for classifying and defining biodiversity, ecological patterns and theories of biodiversity, and an assessment of contemporary patterns and trends in biodiversity."
Encyclopedia of Life Sciences is "a monthly-updating reference work containing over 4,800 specially commissioned, peer-reviewed and citable articles written by leaders in the field. It offers comprehensive and authoritative coverage of the life sciences...."
Grzimek's Animal Life Encyclopedia"is internationally renowned for its scientific reporting, coverage and illustrations, and serves as a major point of reference for researchers and students studying the animal kingdom. Thorough articles familiarize readers with animals found everywhere on the globe, detailing their life cycles, predators, food systems, overall ecology and much more."
Oxford Reference Online: Sciencedelivers access to numerous "subject reference works from one of the world's biggest and most trusted reference publishers into a single cross-searchable resource."