ButterWorths, Probst. E.H & Comrie. J. (1961). Civil Engineering Reference Book. Butterworths: London.
ButterWorths, Probst. E.H and Comrie. J. 1961. Civil Engineering Reference Book. Butterworths: London.
ButterWorths, Probst. E.H and Comrie. J. (1961). Civil Engineering Reference Book. Butterworths: London.
ButterWorths, Probst. E.H and Comrie. J. Civil Engineering Reference Book. Butterworths: London. 1961.