Life in the Soil: A Guide for Naturalists and Gardeners
Groundwater in the Environment: An Introduction
Teaming with Microbes: The Organic Gardener's Guide to the Soil Food Web, Revised Edition (Science for Gardeners)
GIS Tutorial 2: Spatial Analysis Workbook (GIS Tutorials)
Research Design: Qualitative, Quantitative, and Mixed Methods Approaches
Teaming with Nutrients: The Organic Gardener's Guide to Optimizing Plant Nutrition (Science for Gardeners)
Trees: Their Natural History
Practical Environmental Law (Aspen College Series)
Simplified Irrigation Design