Churkin, M., & Carter, C. (1970). Early Silurian graptolites from southeastern Alaska and their correlation with graptolitic sequences in North America and the Arctic. U.S. Govt. Print. Off.
Chicago Style (17th ed.) CitationChurkin, Michael, and Claire Carter. Early Silurian Graptolites from Southeastern Alaska and Their Correlation with Graptolitic Sequences in North America and the Arctic. Washington: U.S. Govt. Print. Off, 1970.
MLA (9th ed.) CitationChurkin, Michael, and Claire Carter. Early Silurian Graptolites from Southeastern Alaska and Their Correlation with Graptolitic Sequences in North America and the Arctic. U.S. Govt. Print. Off, 1970.
Warning: These citations may not always be 100% accurate.