TY  - GEN
AU  - Smith, M.R. ed.
AU  - Collis, L. ed.
TI  - Aggregates : sand, graval and crushed rock aggregates for construction purposes
SN  - 0903317893
PY  - 1993///
CY  - London
PB  - Geological Society
KW  - BUILDING MATERIALS
KW  - SAND AND GRAVEL
ER  -