TY  - BOOK
AU  - Leach, George W. 1957-
TI  - UNIX: self-teaching guide 
SN  - 0471579245
PY  - 1993///
CY  - New York
PB  -  Wiley
KW  - Operating systems (Computers)
KW  - Programmed instruction
N1  - Includes bibliographical references (p. 241-244) and index
ER  -