@article {Amer Soc Photogrammetry,
	title = {Improved Integration of Remote-Sensing and Geographic Information Systems - a Background to NCGIA Initiative 12},
	journal = {Photogrammetric Engineering and Remote Sensing},
	volume = {57},
	number = {6},
	year = {1991},
	pages = {643-645},
	author = {Star, J. L. and Estes, J. E. and Davis, F.}
}
