@article {7712,
	title = {Pattern and the balance of nature},
	journal = {Evolutionary Theory},
	volume = {1},
	number = {1},
	year = {1973},
	month = {July},
	pages = {31-49},
	keywords = {ecology, evolution, evolutionary theory},
	author = {Van Valen, Leigh}
}
@article {7713,
	title = {Energy and evolution},
	journal = {Evolutionary Theory},
	volume = {1},
	year = {1976},
	note = {DO NOT HAVE},
	pages = {179-229},
	author = {Van Valen, Leigh}
}
@article {7711,
	title = {A new evolutionary law},
	journal = {Evolutionary Theory},
	volume = {1},
	number = {1},
	year = {1973},
	month = {July},
	pages = {1-30},
	keywords = {evolution, evolutionary theory, extinction},
	author = {Van Valen, Leigh}
}
