Changes in the Avifauna of the Hokkaido University Campus, Sapporo, Detected by a Long-Term Census
Namba, Tomoyuki and Yabuhara, Yuki and Yukinari, Kazutoshi and Kurosawa, Reiko, Ornithological Science, 9, 37-48 (2010), DOI:http://dx.doi.org/10.2326/osj.9.37