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Magnetostratigraphic calibration of Southern Ocean diatom datums from the Eocene–Oligocene of Kerguelen Plateau (Ocean Drilling Program sites 744 and 748)
Ocean Drilling Program holes 744A and 748B represent key sections for calibration of Southern Ocean Eocene-Oligocene biostratigraphic zonations. Sites 744 and 748 were above the carbonateExpand
Hybridization between Crataegus monogyna Jacq. and C. laevigata (Poiret) DC. in south-eastern England
Hybridization between C. monogyna Jacq. and C. laevigata (Poiret) DC. (c. oxyacantllOides Thuill.) has been investigated in selected populations in south-eastern England. The results show that mostExpand
Chromosome numbers of some Eurasian species of Crataegus
The structure of some Crataegus populations in north-eastern France and south-eastern Belgium
There are at least three species of Crataegus in north-eastern France and adjoining areas: C. monogyna Jacq., C. laevigata (Foiret) DC., and·C. curvisepala Lindman subsp. lindmanii (Hrabetova-Uhrova)Expand