Riego precolonial y tradicional en la sierra norte del EcuadorGregory W. Knapp · First published 1992Open the Tome
Linguistic and cultural geography of contemporary PeruGregory W. Knapp · First published 1987Open the Tome
Linguistic and cultural geography of conteporary PeruGregory Knapp · First published 1987Open the Tome
Pre-Hispanic Agricultural Fields in the Andean Region, Part IWilliam M. Denevan, Kent Mathewson, Gregory Knapp · First published 1987Open the Tome
Pre-Hispanic Agricultural Fields in the Andean Region, Part IiWilliam M. Denevan, Kent Mathewson, Gregory Knapp · First published 1987Open the Tome