In 'The Ibis: Journal of the British Ornithologists' Union,' Volume 103a, No. 2, April 1961. Part I. Introduction: The Analysis of Bird Songs and Their Expression in Graphic Notation. pp. 231-245. Part II. The Songs of the Buntings (Emberizidae). No. 2, April 1961, pp. 246-259. Complete number for April with additional articles by Jenkins,Lofts and Marshall, Ballance and Lee, Matthews, Tickell and Scotland, Fry, Davies, and Bryant.