By Macariola-See Nora   Woodard Howard   in Journal of Plant Nutrition

ISSN:0190-4167|29|6|1021-1033

Taylor & Francis Ltd‎(2006)‎

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By Swinton John   De Berry Thomas   Scafidi Benjamin   Woodard Howard   in Education Economics

ISSN:1469-5782|18|4|395-405

Routledge Ltd‎(2010)‎

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