URLDate
Verified		Extra Software
Requirements
(if any)		Access
Conditions		Notes
http://dx.doi.org/10.1080/01904168509363381DOI Link
https://www.ars.usda.gov/ARSUserFiles/60100500/csr[...]01/31/2017PDF Reader
http://www.tandfonline.com/doi/pdf/10.1080/0190416[...]Item not verifiedPDF Reader Item is within a limited-access website