A book for boys, but not without value to the older student of live animals.
Hensen, V.
1887. Ueber die Bestimmung des Plankton’s oder des in Meere treibenden Materials an Pflanzen und Thieren; nebst Anhang. Fünfter Ber. der Komm. zur wissensch. Untersuch. d. deutschen Meere in Kiel für die Jahre 1882 bis 1886, pp. 1-107, III-XVIII, Berlin.
This appears to be the original account of quantitative studies as applied to plants and animals of an association. These methods have been extended to the sea bottom by Petersen, to fresh water by many students, to land animals mainly by Dahl, and in recent years to plants by Clements and others.
Herrick, C. L.
1905. Home Life of Wild Birds. Revised Edition, pp. 255. New York.
Very valuable for suggestions on the study of live birds and how to photograph them.
Hopkins, A. D.
1893. Note and Record Keeping for the Economic Entomologist. U. S. Dept. Agr., Div. Ent., Insect Life, Vol. VI, pp. 103-108.
Job, H. K.