by Campbell, Joseph T., Lobao, Linda M., Betz, Michael R.
Published in Economic development quarterly (01.08.2017)

by Campbell, Joseph T., Koontz, Tomas M., Bonnell, Joseph E.
Published in Society & natural resources (01.11.2011)

by Campbell, Joseph T
Year of Publication 24.06.2008

by JOSEPH T. CAMPBELL, HEYWOOD Y. BILLINGS
Year of Publication 10.12.1918

by MICHAEL JOSEPH CAMPBELL ET AL
Year of Publication 13.10.1993

by JOHN EDWARD CAMPBELL ET JOHN JOSEPH DE
Year of Publication 17.05.1963