Pierotti, Raymond2015-04-292015-04-291980-02-01Pierotti, Raymond. (1980). "Spite and Altruism in Gulls." American Naturalist, 115(2):290-300. http://www.dx.doi.org/10.1086/283561.https://hdl.handle.net/1808/17547No abstract is available for this item.Article10.1086/283561openAccess