Zijlstra, G.; Konijnenburg‐van Cittert, J. H. (2020). (2791–2792) Proposals to conserve the name Williamsonia with a conserved type
and W. gigas T.M. Harris against W. gigas (Lindl. & Hutton) Carruth. (fossil Cycadophyta: Bennettitales). Taxon. 69(6): 1376-1378.
(2791–2792) Proposals to conserve the name Williamsonia with a conserved type
and W. gigas T.M. Harris against W. gigas (Lindl. & Hutton) Carruth. (fossil Cycadophyta: Bennettitales)