Burton, C. J. (1969). Variation studies of some phacopid trilobites of Eruasia and North West Africa.
Style de citation Chicago (17e éd.)Burton, Christopher J. Variation Studies of Some Phacopid Trilobites of Eruasia and North West Africa. 1969.
Style de citation MLA (8e éd.)Burton, Christopher J. Variation Studies of Some Phacopid Trilobites of Eruasia and North West Africa. 1969.
Attention : ces citations peuvent ne pas être correctes à 100%.