Dyfyniad APA

Burton, C. J. (1969). Variation studies of some phacopid trilobites of Eruasia and North West Africa.

Dyfyniad Arddull Chicago

Burton, Christopher J. Variation Studies of Some Phacopid Trilobites of Eruasia and North West Africa. 1969.

Dyfyniad MLA

Burton, Christopher J. Variation Studies of Some Phacopid Trilobites of Eruasia and North West Africa. 1969.

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