John Opie

Designing a Critical Thinking Model for a Comprehensive Technological University

Norbert Elliot, Karl Schweizer, Robert Lynch, 1991 .

Explorations in Environmental History

John Opie, 2000 .

Managing the Environment, Managing Ourselves: A History of American Environmental Policy

John Opie, 2001 .

Ogallala: water for a dry land.

John Opie, J. Opie, 1994 .