@book{21483,
	author = {Sage, R.F.},
	title = {Was low atmospheric CO2 during the Pleistocene a limiting factor for the origin of agriculture?},
	url = {https://drive.google.com/file/d/1yAqA4tZ3XzVeeQjC6vsE7jb1_oWqQHru/view?usp=drivesdk}
}