The Cornell Lab of Ornithology Bird Biology Home Study Course. 1977, 4th printing. This home study course includes binders with course materials, an index, and a glossary, making it easy for students to access and utilize the information at their convenience. This is a valuable tool for anyone interested in learning more about bird biology in English language. Ideal for bird enthusiasts and students, this course provides a detailed exploration of various aspects of avian biology. The questions have been answered, and there is yellow highlighting throughout the material. It is in a three ring binder. If you like birds, this would be a good resource for your collection !