00634nam a2200193Ia 450000500170000000800460001703700120006304000210007504100130009608400230010910000300013224500380016226000510020030000140025165000250026594200230029099900210031395201060033420250508161650.0008  250505s9999    xx            000 0 eng d  aTextual  aFEDL bengcFEDL  aeng2eng  a001.424, DAYqFEDL  aDayton C Mitchell9602033 0aDesign of educational experiments  aNew York, USAbMcGraw Hill Book Company c1970  axi, 441p.  aOperational Research  cTEXLh001.424, DAY  c1371423d1371423  00104070aFEDLbFEDLd2025-05-08l0o001.424, DAYpEL0059423r2025-05-08 16:16:50w2025-05-08yTEXL