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- [3] PLANNING EDUCATIONAL-RESEARCH - DETERMINING THE NECESSARY SAMPLE-SIZE JOURNAL OF EXPERIMENTAL EDUCATION, 1984, 53 (01): : 40 - 48
- [5] SAMPLE-SIZE CONSIDERATIONS FOR NON-RANDOMIZED COMPARATIVE STUDIES JOURNAL OF CHRONIC DISEASES, 1980, 33 (03): : 175 - 181
- [6] SAMPLE-SIZE CONSIDERATIONS IN VACCINE TRIALS CONTROLLED CLINICAL TRIALS, 1986, 7 (03): : 253 - 253