U.S. Code of Federal Regulations
Regulations most recently checked for updates: Sep 28, 2023
The thickness and density of a leaf or the weight per unit of surface. (See Elements of Quality, § 29.3586.)
Regulations most recently checked for updates: Sep 28, 2023
The thickness and density of a leaf or the weight per unit of surface. (See Elements of Quality, § 29.3586.)