International Union of Geological Sciences

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López SRF, Pavia G, Erba E, Guiomar M, Henriques MH, Lanza R, Mangold C, Morton N, Olivero D, Tiraboschi D.  The Global Boundary Stratotype Section and Point (GSSP) for base of the Bathonian Stage (Middle Jurassic), Ravin du Bès Section, SE France.  Episodes 2009;32:222-248.