Pierotti, RaymondBellrose, Cheryl A.2015-03-032015-03-031986-04-01Pierotti, Raymond; Bellrose, Cheryl A. (1986). "Proximate and Ultimate Causation of Egg Size and the 'Third-Chick Disadvantage' in the Western Gull." Auk, 103(2):401-407. http://www.jstor.org/stable/4087093.0004-8038https://hdl.handle.net/1808/16918This is the publisher's version, also available electronically from http://www.jstor.org/stable/4087093?seq=1#page_scan_tab_contents.No abstract is available for this item.ArticleopenAccess