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S.C."C.si M."S.R.L.
S.N.
S.P.L.A.
Saeculum
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Saeculum I.O.
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Safire
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Salut 2000
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Scaiul
Science Research Associates
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Scriptor
Scriptorium
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Secolului XXI
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Sedan Publishing House
Sedcom Libris
Semne
Sepirodalmi
Septentrion
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Sfatul Popular al Capitalei
Sfinx
Sfynx
Sfynx-V.R.
Sibila
Sibila Craiova
Sieben Publishing
Sigma
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Signum
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Silvana
Simec
Simplu
Simrom
Sinopsis
Sirius
Societatea "Prietenii Muzeului Bălcescu"
Societatea ,,Adevărul"