1. ASTM, 1981a. Standard Test Method for Water Absorption of Plastics. ASTM Designation 570–81.
2. ASTM, 1981b. Standard Test Method for Dry and Wet Bulk Density, Water Absorption, and Apparent Porosity of Thin Sections of Glass–Fiber Reinforced Concrete. ASTM Designation (C 948–81).
3. ASTM, 1990a. Standard test methods for impact resistance of plastics and electrical insulating materials. ASTM Designation 256.
4. ASTM, 1990b. Standard test methods for flexural properties of un-reinforced and reinforced plastics and electrical materials. ASTM Designation 790.
5. ASTM, 1991. Standard test method for compressive properties of rigid plastics. ASTM Designation 695.