the following books are on sale and have good conditons

1. Physical science with modern application (5 the edition) -----Merken

2. Introduction to Physical geology (2d edition)--- W.Kenneth Hamblin

3)Earth Science and the environment----Thompson , Turk

4)conservation of natural resources(2d edition) --david castillon

1. essentials of modern geology an environmental approach----Thopson, Turk

6)exploring earth an introduction to physical geology---Davidson ,Reed, Davis