@book{bhlitem188488, title = {British birds }, volume = {v.49 (1956)}, copyright = {In copyright. Digitized with the permission of the rights holder.}, url = {https://www.biodiversitylibrary.org/item/188488}, note = {https://www.biodiversitylibrary.org/bibliography/105650}, publisher = {London, }, author = {}, year = {1956}, pages = {676}, }