000 nam a22 4500
082 _aThe.627
_bK3c
_d1990
100 _aKanchadin Srapratoom
245 _aThe Comparative study on engineering and economical effieiency detween closed conduit flow and open channel flow by grarity
260 _aBangkok
_bFaculty of Graduate studies.Mahidol University
_c1990
942 _c82
999 _c7164
_d7164