Agricultural resources and environmental indicatorsKeith Daniel Wiebe, Noel R. Gollehon · First published 2006Open the Tome
Land quality, agricultural productivity, and food securityKeith Daniel Wiebe · First published 2003Open the Tome
Linking land quality, agricultural productivity, and food securityKeith Daniel Wiebe · First published 2003Open the Tome
Who will be fed in the 21st century?Nicole Ballenger, Keith Daniel Wiebe, Per Pinstrup-Andersen · First published 2001Open the Tome
