Earth and Sky Every Child Should Know: Easy Studies of the Earth and the Stars for Any Time and Place

Wild Animals Every Child Should Know: Life Stories and Other True Stories of the Wild Cousins of Domestic Animals and Other Warm-blooded Quadrupeds

Among Green Trees: A Guide to Pleasant and Profitable Acquaintance with Familiar Trees

Trees Worth Knowing

The Tree Book: A Popular Guide to a Knowledge of the Trees of North America and to Their Uses and Cultivation

Trees that Every Child Should Know: Easy Tree Studies for All Seasons of the Year

The Shell Book: A Popular Guide to a Knowledge of the Families of Living Mollusks, and an Aid to the Identification of Shells Native and Foreign

Trees Worth Knowing

Earth and Sky Every Child Should Know: Easy studies of the earth and the stars for any time and place

The Tree Book: A Popular Guide to a Knowledge of the Trees of North America and to Their Uses and Cultivation

Wild Animals

Earth and Sky Every Child Should Know: Easy Studies of the Earth and the Stars for Any Time and Place

The Book of Useful Plants

Trees Worth Knowing

The Shell Book: A Popular Guide to a Knowledge of the Families of Living Mollusks, and an Aid to the Identification of Shells Native and Foreign

The Tree Book: A Popular Guide to a Knowledge of the Trees of North America and to Their Uses and Cultivation

The Shell Book: A Popular Guide to a Knowledge of the Families of Living Mollusks, and an Aid to the Identification of Shells Native and Foreign, Volume 15

The tree book. A popular guide to a knowledge of the trees of North

A Key to The Nature Library: The Open Book of Nature

The Shell Book: A Popular Guide to a Knowledge of the Families of Living Mollusks, and an Aid to the Identification of Shells Native and Foreign