Henn, R. W. (1996). Practical guide to grouting of underground structures. New York, NY.: American Society of Civil Engineers.
Παραπομπή Chicago StyleHenn, Raymond W. Practical Guide to Grouting of Underground Structures. New York, NY.: American Society of Civil Engineers, 1996.
Παραπομπή MLAHenn, Raymond W. Practical Guide to Grouting of Underground Structures. New York, NY.: American Society of Civil Engineers, 1996.
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