Imlay, R. W. (1982). Late Bajocian ammonites from southern Alaska: In Alaska, upper Bajocian beds have been found only in the south ; they have been dated by ammonites as early late Bajocian ; apparently, southern Alaska was not connected with the rest of Alaska during late Bajocian time. U. S. Government Print. Office.
Chicago Style (17th ed.) CitationImlay, Ralph Willard. Late Bajocian Ammonites from Southern Alaska: In Alaska, Upper Bajocian Beds Have Been Found Only in the South ; They Have Been Dated by Ammonites as Early Late Bajocian ; Apparently, Southern Alaska Was Not Connected with the Rest of Alaska During Late Bajocian Time. Washington: U. S. Government Print. Office, 1982.
MLA (9th ed.) CitationImlay, Ralph Willard. Late Bajocian Ammonites from Southern Alaska: In Alaska, Upper Bajocian Beds Have Been Found Only in the South ; They Have Been Dated by Ammonites as Early Late Bajocian ; Apparently, Southern Alaska Was Not Connected with the Rest of Alaska During Late Bajocian Time. U. S. Government Print. Office, 1982.