Engineering Foundation Conference (1993 : Niagara-on-the-Lake, Canadá ) text xxu New York, N.Y Engineering Foundation 1982 monographic eng 191 pages : illustrations. Engineering Foundation Selected papers presented at the 1982 Engineering Conference Paipa, Boyacá, Colombia Construcciones subterráneas Hormigón proyectado Congresos 624.19 0939204274 231124 20250825175032.0 u5234