(1972). Spon's architects' and builders' price book (97th ed.). London: E. & FN. Spon.
Παραπομπή Chicago StyleSpon's Architects' and Builders' Price Book. 97th ed. London: E. & FN. Spon, 1972.
Παραπομπή MLASpon's Architects' and Builders' Price Book. 97th ed. London: E. & FN. Spon, 1972.
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