Gram, Hans-Erik Persson,Hakan Skarendahl,Ake Natural Fibre Concrete Report from a SAREC Financed Research and development Project / Hans-Erik Gram, Hakan Persson adn Ake Skarendahl - Stockholm SAREC 1984 - 139p. - SAREC Report . Subjects--Topical Terms: Natural Fibre ConcreteProduction Economics