Rao, U. G. K. (1959). Soil mechanics for railway engineers. Railway Testing and Research Centre.
Lua i Stíl Chicago (17ú heag.)Rao, U. G. K. Soil Mechanics for Railway Engineers. Lucknow: Railway Testing and Research Centre, 1959.
Lua MLA (8ú heag.)Rao, U. G. K. Soil Mechanics for Railway Engineers. Railway Testing and Research Centre, 1959.
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