TY  - BOOK
AU  - TRB
ED  - National Research Council (U.S.).
ED  - United States.
TI  - Maintenance of unpaved roads
SN  - 030902966X
AV  - TE220 .N37 1979a
U1  - 625.74028 
PY  - 1979///
CY  - Washington
PB  - National Academy of Sciences
KW  - Roads
KW  - Developing countries
KW  - Maintenance and repair
N1  - "Prepared under contract AID/OTR-C-1591, project 931-1116, U.S. Agency for International Development."; Bibliography: p. 41-42
ER  -