Beech J.C. Mastic asphalt for flat roofs: testing for quality assurance / J.C.Beech,G.K.Saunders, 1991. - 4 p. - Текст : непосредственный.
Beech J.C. Joint sealants and primers : further studies of performance with porous surfaces / J.C.Beech,D.W.Aubrey, 1990. - 4 p. - Текст : непосредственный.