Graptolite succession across the Ordovician–Silurian boundary in south-eastern Alaska

MLA

Michael Churkin, et al. “Graptolite Succession across the Ordovician–Silurian Boundary in South-Eastern Alaska.” Quarterly Journal of the Geological Society, vol. 126, Dec. 1970, pp. 319–30. EBSCOhost, https://doi.org/10.1144/gsjgs.126.1.0319.

APA

Michael Churkin, George Donald Eberlein, & Claire Carter. (1970). Graptolite succession across the Ordovician–Silurian boundary in south-eastern Alaska. Quarterly Journal of the Geological Society, 126, 319–330. https://doi.org/10.1144/gsjgs.126.1.0319

Chicago

Michael Churkin, George Donald Eberlein, and Claire Carter. 1970. “Graptolite Succession across the Ordovician–Silurian Boundary in South-Eastern Alaska.” Quarterly Journal of the Geological Society 126 (December): 319–30. doi:10.1144/gsjgs.126.1.0319.