http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Guide to the Gallery of Birds in the Department of Zoology, British Museum (Natural History)
iv, 163 pages, 1 unnumbered leaf of plates : illustrations ; 25 cm. + atlas (5 pages, 24 leaves of plates : illustrations ; 25 cm.)
"Appendix on the structure of birds": pages 137-150.