4.2BSD/usr/doc/refer/biblio

%A Mike E. Lesk
%T Some Applications of Inverted Indexes on the Unix System
%J Unix Programmer's Manual
%I Bell Laboratories
%C Murray Hill, NJ
%D 1978
%V 2a
%X Difficult to read paper that dwells on indexing strategies,
giving little practical advice about using \efBrefer\efP.

%A Alfred V. Aho
%A Brian W. Kernighan
%A Peter J. Weinberger
%T Awk \(em A Pattern Scanning and Processing Language
%J Unix Programmer's Manual
%I Bell Laboratories
%C Murray Hill, NJ
%D 1978
%V 2a