@inproceedings{SIGFIDET-1971-Engles,
	author        = "Robert W. Engles",
	booktitle     = "{Proceedings of the Second ACM-SIGFIDET Workshop on Data Description, Access and Control}",
	cdrom         = "SIGFIDET71/P069.pdf",
	pages         = "69--91",
	publisher     = "{ACM}",
	title         = "{An Analysis of the April 1971 Data Base Task Group Report}",
	year          = 1971,
}