Voluntary conservation of endangered species: when does no regulatory assurance mean no conservation?

Potential environmental impacts of increased reliance on corn-based bioenergy

Langpap, Christian, (2011)

Voluntary conservation of endangered species : when does no regulatory assurance mean no conservation?

Langpap, Christian, (2004)

Protecting watershed ecosystems through targeted local land use policies

Langpap, Christian, (2008)