The Library of Work and Play: Outdoor Work
CHAPTER IX.
Botany. Bailey. The Macmillan Co.
The Sea Beach at Ebb-tide. Arnold. The Century Co.
Cornell Nature Study Leaflets. How to Make a Collection of Insects. Comstock. J. B. Lyon, Albany, N. Y.
United States National Museum Bulletin 39. Collecting Fossils, Plants, Insects, Shells, Arrowheads, etc.