TY  - BOOK
AU  - Kulkarni, Ram B.
AU  - Van Til, Cecil J., coaut.
ED  - National Research Council. Transportation Research Board (E-.U.A.)
TI  - Manual for the selection of optimal maintenance levels of s-ervice / Ram B. Kulkarni and Cecil J. Van Til
CY  - Washington, D.C. : TRB
ER  -