Reproductive dominance in bumblebees : an etho-physiological study / Adrianus van DoornThe development and stability of filial preferences in the chick : (Gallus gallus) / Johannus Jan BolhuisThe regulation of colony development in the bumblebee, Bombus terrestris / Maria Josephina Helena Magaretha DuchateauSocial behaviour and social organization of a herd of plains zebra in a safari park / Matthijs Berend Harm SchilderThe development and stability of filial preferences in the chick (Gallus gallus) / door Johannus Jan BolhuisReciprocity and other social relationships in captive chimpanzees / Charlotte Korinna HemelrijkThe social prisoner : causes of natural variation in reproductive success of the Oystercatcher / Bruno Johan EnsSocio-economics of the carpenter bee Xylocopa pubescens / Katja HogendoornBrain opioids and social play behavior in rats / Lodewijk Johannes Marie Jacobus VanderschurenDisturbed social behavior in rats : social isolation and endogenous opioids / Thorwald HolFemales, foods and fights : a socioecological comparison of the sympatric Thomas langur and long-tailed macaque / Elisabeth Hubertina Maria SterckEffects of peer-only rearing in young chimpanzees : a comparison of social behaviour development in peer and family groups / René Philippe SpijkermanWelzijn, een onschatbare waarde? / Berry M. SpruijtBehavioural and chronobiological consequences of social stress in rats / Peter Meerlo ; [fig. Dick Visser ... et al.]Social influences on ageing in group-living long-tailed macaques (Macaca fascicularis) / Hans Christiaan VeenemaBimaturism in orang-utan males : reproductive and ecological strategies / Sri Suci Utami AtmokoSocial behaviour in the rat / door Paul Jozef Alphons TimmermansSociaal gedrag bij apen / Thelma Rowell ; vertaald uit het Engels door C. SykoraHabitat preferences, diet, feeding strategy and social organization of the black spider monkey (Ateles paniscus paniscus Linnaeus 1758) in Surinam / [by] M.G.M. van RoosmalenThe social structure of bumble-bee colonies / Cornelis Gerardus Johannes van HonkHet sociale leven der dieren / Adolf Portmann ; [vert. uit het Duits door A. van Agen]Social behavior of the Ruff, Philomachus pugnax (L.) / Alida Johanna Hogan-WarburgAspecten van het sociale gedrag en de communicatie bij humane en hogere niet-humane primaten = Aspects of the social behaviour and communication in human and higher non-human primates / door Johan Antoon Reinier Alex Maria van HooffSocial behavior of rats : interaction of environment and neuropeptides in dyadic encounters / Raymundus Johannes Maria NiesinkHabitat preferences, diet, feeding strategy and social organization of the black spider monkey (Ateles paniscus paniscus Linnaeus 1758) in Surinam / M.G.M. van RoosmalenSocial mechanisms in stingless bees / Marinus Jan SommeijerThe socio-ecology of Sumatran long-tailed macaques (Macaca fascicularis) / (met een samenv. i.h. Nederl.) ; (dengan ringkasan dalam bahasa Indonesia)