World report on palaeobotany: VII
Boureau, E., ed.
World report on palaeobotany: VII - Utrecht International Bureau for Plant Taxonomy and Nomenclature 1971 - 188 p. - Vol 78; Netherlands Internati .
World report on palaeobotany: VII - Utrecht International Bureau for Plant Taxonomy and Nomenclature 1971 - 188 p. - Vol 78; Netherlands Internati .