North American Product Classification System (NAPCS) Canada 2017 Version 2.0
- 162 - Stone, sand, gravel, clay, and refractory minerals
- 16212 - Sand, gravel, clay, and refractory minerals
- 162121 - Construction sand and gravel
- 1621211 - Construction sand and gravel
- 162122 - Industrial sand
- 1621221 - Industrial sand
- 162123 - Clay and refractory minerals
- 1621231 - Clay and refractory minerals
- Date modified: