Chen, Shusheng (1995). The horizontal pre-support in tunnels. M.S. thesis, Massachusetts Institute of Technology. URI: https://dspace.mit.edu/handle/1721.1/36992
Chen, Shusheng (1995). The horizontal pre-support in tunnels. M.S. thesis, Massachusetts Institute of Technology. URI: https://dspace.mit.edu/handle/1721.1/36992