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National Audubon Society Field Guide to Wildflowers

by William A. Niering, Nancy Olmstead, National Audubon Society Staff

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by William A. Niering, N. Olmstead

Native Shrubs for Landscaping

by Sally L. Taylor, Glenn D. Dreyer, William A. Niering

Familiar Flowers of North America, Western Region

by William A. Niering, Richard Spellenberg