00481cam a2200181 4500 u404 SIRSI 20250825174944.0 190129n cl 000 0 eng u 300.18 R432m.E 1965 Research methods in social relations 1 ed. USA : Holt, Rinehart and Winston, 1965 xvi, 622 p. Ciencias sociales Investigaciones Metodología Selltiz, Claire 2590 2590 2026-03-12 00:00:00 001868 300.18 R432m.E 1965 001868 1 2025-08-25 BOOK 0 0 0 COL_GRAL 0 BCENTRAL BCENTRAL 2019-01-29