title: Selecting samples for research studies requires knowledge of the populations of interest.
authors.forename: S C
authors.initials: SC
authors.lastname: Beyea
authors.forename: L H
authors.initials: LH
authors.lastname: Nicoll
mesh_terms: D006801:Humans; D015399:Nursing Research; D012107:Research Design; D012494:Sampling Studies; D009626:Terminology as Topic; D014481:United States