R. A. Fortey, D. A. T. Harper, J. K. Ingham, A. W. Owen, A. W. A. Rushton; A revision of Ordovician series and stages from the historical type area. Geological Magazine ; 132 (1): 15–30. doi:
Download citation file:
Sign In or Create an Account
This PDF is available to Subscribers Only
For full access to this pdf, sign in to an existing account, or purchase an annual subscription.