@book{bhlitem189709, title = {British birds }, volume = {v.63 (1970)}, copyright = {In copyright. Digitized with the permission of the rights holder.}, url = {https://www.biodiversitylibrary.org/item/189709}, note = {https://www.biodiversitylibrary.org/bibliography/105650}, publisher = {London, }, author = {}, year = {1970}, pages = {626}, }