000 00295 a2200109 4500
082 _a627.12
_bW52a
245 1 _aANNUAL REPORT OF THE RIVER RESEARCH INSTITUTE
260 _a
_b
_c1961
440 _aAnnual Report Of The River Research Institute
_vPub. No.24
964 _gCIRC
997 _a34219 s C
999 _c456068
_d456068