TY  - GEN
AU  - Young, Anthony
AU  - Yoyng, Doreen M
TI  - Slope development
SN  - 0333320696
U1  - 551.436 
PY  - 1990///
CY  - London
PB  - Macmillan
KW  - Slopes
KW  - Young, Doreen
ER  -