1.
Population Explosion and Other Mathematical Puzzles
by Hess, Dick, Hess, Richard I.
ISBN: 9789814740975
List Price: $48.00
2.
Population Explosion and Other Mathematical Puzzles
by Hess, Dick, Hess, Richard I.
ISBN: 9789814733755
List Price: $28.00
3.
Analysis of Research Needs Concerning the Treatment, Utilization and Disposal of Wastewater ...
by Dick, Richard I., Water Pol...
ISBN: 9780943244037
List Price: $32.00