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American Journal of Agricultural and Biological Sciences

ISSN 1557-4989 (print)eISSN 1557-4997 (online) Open access
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Research Article · Open access · Published 31 March 2008

Variables Refinery Process to Ensure Research Unbiasedness (Validity) and Invariance (Reliability) in Agricultural Extension and Education

Iraj Malek Mohammadi
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