A bio- and chemostratigraphic search for the Mid-Ludfordian Carbon Isotope Excursion interval in the Ludlow of the Ohesaare core, EstoniaKaljo, Dimitri; Martma, Tõnu; Märss, Tiiu; Nestor, Viiu-Kai; Viira, ViiveEstonian journal of earth sciences2022 / p. 44-60 : ill https://doi.org/10.3176/earth.2022.04 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS