Hands on lake ecology : student workbook.

Includes classroom activities and experiments designed to develop a greater understanding of the forces impacting water quality and the living things within the lake environment.

Printing & publishing industry pollution prevention and recylcling : student manual /

[Prepared by] Center for Hazardous Materials Research, University of Pittsburgh, Applied Research Center.

Training operations in small departments : student manual /

Designed to provide the student [i.e. the training officer] with the essential tools and skills to lead and manage a training program in a small department.