por Sewell, E.C | Alphey, R.S., coaut | Building Research Establishment (Inglaterra).
por Hole, W.V | Taylor, J.R.B., coaut | Building Research Establishment (Inglaterra).
por Jenkins, M.P | Salvidge, A.C., coaut.Utley, W.A., coaut | Building Research Establishment (Inglaterra).
por Cockram, A.H | Gooding, P.E., coaut | Building Research Establishment (Inglaterra).