@inbook{NARMS:SourceID:47822, author = {Walker, J.}, title = {Essays on natural history and rural economy. London (Longman, Hurst, Rees & Orme) and Edinburgh (Guthrie & Haderson). pp 196-197}, url = {https://vliz.be/vmdcdata/narms/narms.php?p=sourcedetails&id=47822}, year = {1812} }