Датский ярус (Russian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Датский ярус" in Russian language version.

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stratigraphy.org

web.archive.org

wikisource.org

ru.wikisource.org

  • Датский ярус // Энциклопедический словарь Брокгауза и Ефрона : в 86 т. (82 т. и 4 доп.). — СПб., 1890—1907.