@article {1997,
	title = {La biogeograf{\'\i}a ecol{\'o}gia de los escarabajos del esti{\'e}rcol},
	journal = {Acta Polit{\'e}cnica Mexicana},
	volume = {16},
	number = {72},
	year = {1975},
	note = {requested 1/23},
	pages = {89-98},
	keywords = {dung beetle, food, mammal, mammals, resource},
	author = {Matthews, E. G.}
}
@article {1998,
	title = {The natural history of dung beetles of the subfamily Scarabaeinae (Coleoptera, Scarabaeidae)},
	journal = {Folia Entomologica Mexicana},
	volume = {12-14},
	year = {1966},
	note = {have copy- need to scan},
	pages = {1-312},
	keywords = {dung beetle, food, mammals, resources},
	author = {Matthews, E. G. and Halffter, Gonzalo}
}
