Birds - Research.

Bird census techniques / by: (Language materials, printed)

Current ornithology.. Volume 17 by: (Language materials, printed)

The extended specimen : = emerging frontiers in collections-based ornithological research / by: (Language materials, printed)

Bird populations- Estimates- Great Britain.

Animal Physiology.

Ornithology.

Evolutionary Biology.

Life Sciences.

Birds- Counting.

Birds- Research.

Animal Systematics/Taxonomy/Biogeography.

Zoology.

Birds- Collection and preservation.