Trees of North America: A Guide to Field Identification, Revised and Updated (Golden Field Guide from St. Martin's Press)

Wildflowers: A Fully Illustrated, Authoritative and Easy-to-Use Guide (A Golden Guide from St. Martin's Press)

Birds of North America: A Guide To Field Identification (Golden Field Guide from St. Martin's Press)

Audubon Society Field Guide to North American Trees: Eastern Region

National Wildlife Federation Field Guide to Trees of North America

Insects (A Golden Guide from St. Martin's Press)

Identifying Trees of the East: An All-Season Guide to Eastern North America

National Geographic Field Guide to the Trees of North America: The Essential Identification Guide for Novice and Expert

National Audubon Society Field Guide to North American Trees--W: Western Region (National Audubon Society Field Guides)

Weeds (A Golden Guide from St. Martin's Press)

A Field Guide to Eastern Trees: Eastern United States and Canada, Including the Midwest (Peterson Field Guides (Paperback))