@book{207394,
	author = {Guyton, T.L. and Proceedings of the Pennsylvania Academic of Sciences 1: 1},
	title = {Aphids attend by ants in Pennsylvania  /},
	note = {Sobretiro de: Proc. Penn. Acad. Sc. 1:  1-3, 1927. Encuadernado con otros impresos similares}
}