Study that draws inferences from a sample to a population, in cases where the independent variable is not under the control of the researcher because of ethical concerns or logistical constraints

206 pages : illustrations, portraits ; 22 cm.

William Harvey, la circulation du sang et l'épigenèse des embryons : les prémisses de la méthode expérimentale / Paul Mazliak.

xiii, 340 pages, 16 pages of plates : ilustrations (some colour) ; 26 cm

Early modern print media and the art of observation : training the literate eye / Stephanie A. Leitch, Florida State University.

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Observational Studies as Topic

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William Harvey, la circulation du sang et l'épigenèse des embryons : les prémisses de la méthode expérimentale / Paul Mazliak.

Early modern print media and the art of observation : training the literate eye / Stephanie A. Leitch, Florida State University.