| Save | Year | Entries | |
| Myristicaceae -- Singapore -- Geographical distribution : Wee, Yeow Chin | 1962 | 1 | |
| Phytogeography -- Singapore : Wee, Yeow Chin | 1962 | 1 | |
| Plants, Ornamental -- Singapore : Holttum, R. E. | 1995 | 1 | |
| Poisonous plants -- Singapore : Wee, Yeow Chin | c1990 | 1 | |
Your entry Singapore -- Population Statistics, Vital would be here
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| Science and state -- Singapore : Barnard, Timothy P., | 2016 | 1 | |
| Singer, Charles, 1876-1960 -- Correspondence : Sigerist, Henry E. | 2010 | 1 | |
| Singing -- Fiction : Post, Jim, | c2002 | 1 | |
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Single cell proteins -- See also Food supply --subdivision Food supply under individual wars, e.g. World War, 1939-1945--Food supply |
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| Singlet oxygen -- See Active oxygen | 1 | ||
| Sino, Abu Ali ibn, 980-1037 -- See Avicenna, 980-1037 | 1 | ||
| Plants -- Sint Eustatius : Axelrod, Franklin S., | 2017 | 1 | |
| Sinus thrombosis | 1861 | 1 | |
| Sinuses, Nasal -- See Paranasal sinuses | 1 | ||
| Sinuses, Paranasal -- See Paranasal sinuses | 1 | ||
| Siparunaceae -- Classification : Renner, Susanne, | c2005 | 1 | |
| Siparunaceae -- Identification : Renner, Susanne, | c2005 | 1 | |
| Siphonaptera -- See Fleas | 1 | ||
| Siphonata -- See Hemiptera | 1 | ||
| Siphonia ridleyana -- See Hevea | 1 | ||
| Siphonophora -- See Siphonophores | 1 | ||
| Siphonophora (Cnidaria) -- See Siphonophores | 1 | ||
| Siphonophorae -- See Siphonophores | 1 | ||
| Siphonophorans -- See Siphonophores | 1 | ||
| Siphonophores : Leuckart, Rudolf, | 1854 | 1 | |
| Siphons : Morellet, Lucien | 1939 | 1 | |
| Siricid woodwasps -- See Siricidae | 1 | ||
| Siricidae : Cameron, Peter, | 1893 | 1 | |
| Siricids -- See Siricidae | 1 | ||
| Sisal (Fiber) -- Costa Rica | 1916 | 1 | |
| Sisal industry -- Costa Rica | 1916 | 1 | |
| Sisal (Plant) -- Costa Rica | 1916 | 1 | |
| Sissinghurst Castle (England) | 3 | ||
| Sissinghurst Castle (England) -- History : Nicolson, Adam, | 2010 | 1 | |
| Sistan (Iran and Afghanistan) : Pumpelly, Raphael, | 1905 | 1 | |
| Sites, Excavation (Archaeology) -- See Excavations (Archaeology) | 1 | ||
| Sitona -- See also Sitona lineata | 1 | ||
| Sitona lineata : Andersen, K. Th. | 1931 | 1 | |
| Sitotroga cerealella -- France -- Early works to 1800 : Duhamel du Monceau, | 1762 | 1 | |
| Sitsang (China) -- See Tibet Autonomous Region (China) | 1 | ||
| Sitwell, George Reresby, 1860-1943 | 1984 | 1 | |
| Six Nations -- History : Williams, Ted C., | 2007 | 1 | |
| Six van Chandelier, J. (Jan), 1620-1695 : Spaans, Ronny, | 2020 | 1 | |
| Sixth sense -- See Extrasensory perception | 1 | ||
| Size of particles -- See Particles | 1 | ||
| Size of school -- See School size | 1 | ||
| Sjedinjene Američke Države -- See United States | 1 | ||
| Botany -- Sweden -- Skåne | 5 | ||
| Natural history -- Sweden -- Sk°ane | 2 | ||
| Skåne (Sweden) -- Description and travel | 2 | ||
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Skeletal remains -- See Anthropometry --subdivision Anthropometry under classes of persons and ethnic groups; and subdivision Measurement under individual organs and regions of the body, e.g. Foot--Measurement; Heart--Measurement |
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