|| 4 offprints by Nobel Prize in Physiology or Medicine 1973 winner. Shared the prize with Lorenz and Frisch "for their discoveries concerning organization and elicitation of individual and social behaviour patterns". The four titles included are: Social Releases and the Experimental Method Required for Their Study (1948) some notes in light pencil on back cover in unknown hand; The Functions of Territory reprinted from 'Bird Study' vol. 4 No. 1 14-27; Photographic Studies of Some Less Familiar Birds C. Ruff text by Tinbergen, reprinted from British Birds vol. LII, pp. 302-306 September 1959; Comparative Studies of the Behaviour of Gulls (Laridae): A Progress Report reprinted from: Behaviour Vol. XV, 1-2 (Leiden, Brill, 1959) staples little rusted. First edition. Offprints. In Original wrappers. * Very good.