by Carney, Judith Ann, Rosomoff, Richard Nicholas
Year of Publication 2009

by SOLURI, JOHN
Published in Technology and Culture (01.10.2011)

by Opie, Frederick Douglass
Published in Agricultural History (01.04.2011)

by Duvall, Chris S.
Published in Geographical Review (01.10.2010)

by Knight, Frederick C.
Published in American historical review (01.10.2011)