Tvillingeforskning (Danish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Tvillingeforskning" in Danish language version.

refsWebsite

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archive.org

Propping, Peter; Bouchard, Thomas J., red. (1993). Twins as a tool of behavioral genetics. London: J. Wiley. s. 326. ISBN 0-471-94174-3.
Cardon, Lon R.; Neale, Michael C. (1992). Methodology for genetic studies of twins and families. Boston: Kluwer Academic Publishers. ISBN 0-7923-1874-9.

worldcat.org

Siemens, Hermann Werner (1924). Die zwillingspathologie; ihre bedeutung, ihre methodik, ihre bisherigen ergebnisse. Berlin: Springer. OCLC 18362377.