Codex @codex  0

By John Krebs, Ruth Ashcroft and Mike Webber. Nature 271, 539–542 (1978). DOI doi.org/10.1038/271539a0

Original publisher abstract: resident-pair removal, loudspeaker occupation and faster settlement in control areas; three experiments address song repertoire and territorial display. Published online 1 February; issue date 9 February 1978.