DISCUSSION. VICTORIA LINE: EXPERIMENTATION, DESIGN, PROGRAMMING, AND EARLY PROGRESS. Free

VICTORIA LINE, UNDERGROUND, RAILWAYS, EXPERIMENTS, DESIGN, PROGRAMMING, TUNNELS, CONTRACTS, DEVELOPMENT, PLANNING, TUNNELLING, MACHINERY, HYDRAULIC, DRIVING, SHIELDS, SHIELD DRIVEN, DIGGERS, NETWORKS, ANALYSIS, TUBES, CLAYS, LONDON CLAY, POCKETS, GRAVEL, SUBSOIL, SURVEYS, TARGET, DATES, LININGS, STATIONS, PLATFORMS, LONDON, VICTORIA LINE, UK