TY  - GEN
AU  - United Nations Environment Programme
PY  - 2022
UR  - https://wedocs.unep.org/handle/20.500.11822/45252
LA  - English
KW  - manual
KW  - non-metallic mineral
TI  - Worked Examples – Non-Metallic Minerals
M3  - Communication or other resource
ER  -