[THE RANDOM SAMPLING METHOD AND IMPROVEMENT OF ITS CONCLUSIVENESS BY THE FORMATION OF STRATA WITH PARTICULAR REFERENCE TO MEDICAL RESEARCH].
D035843:Biomedical Research; D001699:Biometry; D006801:Humans; D009885:Ophthalmology; D013223:Statistics as Topic
OPHTHALMOLOGY; STATISTICS
STICHPROBENVERFAHREN UND DIE VERBESSERUNG IHRER AUSSAGEKRAFT DURCH SCHICHTENBILDUNG IM HINBLICK AUF MEDIZINISCHE UNTERSUCHUNGEN.