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Appendix
| Mollusks of the Chicago Area | F. C. Baker | Chicago Academy |
| The Little Water Folk. | C. Hawkes | Crowell Co. |
| The Lymnaedæ of North America | F. C. Baker | Chicago Academy of Sciences |
| The Shell Book | Julia E. Rogers | Doubleday, Page & Co. |
| West Coast Shells | Josiah Keep | |
| Worms and Crustacea | Hyatt | D.C. Heath & Co. |
| TREES AND SHURBS | ||
| A Guide to the Trees | Alice Lounsbery | |
| Familiat Trees and Their Leaves | Mathews | |
| Field and Forest Handy Book | Dan C. Beard | |
| First Book of Forestry. | Roth | |
| Forest Trees and Forest Scenery | Schwartz | Grafton Pres |
| Handbook of Trees of New England | Dame and Brooks | Ginn & Co. |
| Handbook of the. Tree, of the Northern United States and Canada. | Hough | |
| How to Tell the Trees | Hinds, Noble & Co. | |
| How to Know Wild Fruits | Maude C. Peterson | |
| Manual of the Trees of North America | Charles Sprague Sargent | |
| North American Trees | Britton | |
| North American Forests and Forestry | Buncken | Putnam |
| Our Native Trees | Keeler | Scribners |
| Our Northern Shrubs | Harriet L. Keeler | |
| Our Shrubs of the United States | Apgar | |
| Practical Forestry for Beginners in Forestry | J. C. Gifford | |
| School of the Woods | W. J. Long | |
| Studies of Trees in Winter | Huntington | Sargent |
| Ten Common Trees | Susan Stokes | American Book Co. |
| The Forest | S. E. White | |
| The Forester's Manual or Forest Trees that Every Scout Should Know | Seton | Doubleday, Page & Co. |
| The Magic Forest | White | Grosset & Dunlap |
| The Way of the Woods. | Breck | Putnam's Sons |
| Trees of the Northern United States | Austin C. Apgar | |
