1. ASTM, 1981a. 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.
2. ASTM, 1981b. Standard Test Method for Water Absorption of Plastics. ASTM Designation D 570–81.
3. ASTM, 1990a. Standard Test Methods For Flexural Properties of Un-Reinforced and Reinforced Plastics and Electrical Materials. ASTM Designation D-790.
4. ASTM, 1990b. Standard Test Methods for Impact Resistance of Plastics and Electrical Insulating Materials. ASTM Designation D-256.
5. ASTM, 1991. Standard Test Method for Compressive Properties of Rigid Plastics. ASTM Designation D-695.