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- [4] Class-size and the Efficiency in Instruction EDUCATIONAL RESEARCH BULLETIN, 1922, 1 (19): : 193 - 195
- [8] Effects of Class-Size Reduction on Students' Performance PERTANIKA JOURNAL OF SOCIAL SCIENCE AND HUMANITIES, 2022, 30 (02): : 797 - 812
- [9] CLASS-SIZE CONDITIONS AND TRENDS AT THE COLLEGE LEVEL SCHOOL AND SOCIETY, 1929, 30 (760): : 98 - 102