| Schedule of rates for repairs and minor works Januari, 1966 | | Tiada | 1966 | |
| Ethnic outmarriage rates in Singapore: the influence of traditional socio-cultural organization | Department of Sociology, University of Singapore | Tiada | 1972 | |
| Ethnic outmarriage rates in SIngapore: the influence of traditional socio-cultural organization | Department of Sociology, University of Singapore | Tiada | 1972 | |