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Ng P. K . L ., . and Yang C.M., . On three new species of freshwater crabs (Crustacea Decapoda Brachyura) from Singapore and Peninsular Malaysia. pp. 57-73. ISSN 0025-1291
Ng P. K . L ., . Peat swamp fishes of Southeast Asia with reference to Malaysia - diversity under threat. pp. 1-5. ISSN 0216-8236
Ng P. K . L ., . and Maitland D . P ., . The fresh water crabs of Singapore. pp. 16-21. ISSN 0126-5318