BS EN 60249-2-1:1994(2001) Base materials for printed circuits — Part 2 : Specifications — Specification No . 1 : Phenolic cellulose paper copper - clad laminated sheet, high electrical quality
2006BS EN 61249-2-2:2005 Materials for printed boards and other interconnecting structures - Part 2-2: Reinforced base materials, clad and unclad - Phenolic cellulose paper reinforced laminated sheets, high electrical grade, copper-clad
1990BS EN 60249-2-1:1994 Base materials for printed circuits - Part 2: Specifications - Specification No. 1: Phenolic cellulose paper copper-clad laminated sheet, high electrical quality