TY  - RPRT
TI  - Lightweight aggregate production from claystone and shale in Bangladesh
AU  - Norbert A. Parker
AU  - M.A. Khan
PY  - 1976
DO  - 10.3133/ofr76163
UR  - https://pubs.usgs.gov/publication/ofr76163
ID  - ofr76163
ER  -