376727 Donovan, D. T. (1966). Stratigraphy: An introduction to principles. Chicago: Rand McNally.
Chicago-čujuhus (17. p.)376727 Donovan, Desmond Thomas. Stratigraphy: An Introduction to Principles. Chicago: Rand McNally, 1966.
MLA-čujuhus (9. p.)376727 Donovan, Desmond Thomas. Stratigraphy: An Introduction to Principles. Chicago: Rand McNally, 1966.
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