TY  - BOOK
AU  -  McCraw,W.E.
TI  -  Studies on the productivity of skidding tractors / 
PY  - 1970///
CY  -  Ottawa : 
PB  -  Queen's Printer for Canada, 
KW  -  Tractors
KW  -  Motor vehicles
KW  -  Skidding
N1  -  Includes bibliographical references
ER  -