61 — Sand, gravel, clay and slag

Descendentes
Código	Descripción
611	Sand for industrial use
612	Ordinary sand and gravel
613	Pumice stone, including pumiceous sand and gravel
614	Clay and clay earth
615	Slag not for recovery of metals, ash, dross

Rúbrica de la agregación NSTR agregada anglès a la cual pertenece

15 Crude and manufactured minerals