URLDate
Verified		Extra Software
Requirements
(if any)		Access
Conditions		Notes
http://dx.doi.org/10.1111/j.1469-8137.1983.tb04500.xDOI Link
http://www.jstor.org/stable/view/243238010/18/2013 Item is within a limited-access website
http://onlinelibrary.wiley.com/doi/10.1111/j.1469-[...]10/18/2013PDF Reader Item is within a limited-access website