Entailment: The Logic of Relevance and Necessity. Anderson, A. & Belnap, N. Volume I , Princeton University Press, 1975.
bibtex   
@book{Anderson:1975,
	Author = {A.R. Anderson and N.D. Belnap},
	Date-Added = {2019-01-15 12:21:55 +0000},
	Date-Modified = {2019-02-03 15:47:03 +0000},
	Publisher = {Princeton University Press},
	Title = {Entailment: The Logic of Relevance and Necessity},
	Volume = {I},
	Year = {1975}}

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