Pearson, G. T. (1992). Conservation of clay and chalk buildings. Shaftesbury, Dorset: Donhead.
Παραπομπή Chicago StylePearson, Gordon T. Conservation of Clay and Chalk Buildings. Shaftesbury, Dorset: Donhead, 1992.
Παραπομπή MLAPearson, Gordon T. Conservation of Clay and Chalk Buildings. Shaftesbury, Dorset: Donhead, 1992.
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