Secret hydrographic surveys in the Spratly Island David Hancox and Victor Prescott - London ASEAN Academic Press 1999 - 219p. 22cm ISBN: 1901919080 RM306.00 Subjects--Topical Terms: Hydrographic surveying--Spratly IslandsNautical charts--Spratly Islands Subjects--Geographic Terms: Spratly Islands--Maps