000 00491cam a2200169 4500
001 D10720
008 090401t xxu||||| |||| 00| 0 eng d
035 _a(Sirsi) u96042
041 _aeng
050 _a526.990285
100 _aGreen, P.
245 _aPosition fixing using underwater acoustic beacons. Hydrographic Journal No. 11. April 1978 p.21-29
350 _a0
520 _aIn: RICS. Land surveyors information package 11: acoustic positioning
942 _n0
948 _c04/03/1997
999 _c98587
_d98587