000 002770000a22001090004500
245 _aPragathiya 1970-1975
110 _aSri Lanka Ministry of Irrigation, Power & Highways
260 _aColombo
_c1975
300 _a147 p., ill.
080 _a354(548.7)(047.1)
_bS7
942 _cBK
999 _c106001
_d106001