Angiosperm taxonomy in practice / B. L. Burtt
Phyletic and phenetic versus omnispective classification / R. E. Blackwelder
The role of palaeobotany in vascular plant classification / T. Delevoryas
The value of some methods of numerical taxonomy with reference to hominoid classification / A. J. Boyce
Reconstruction of evolutionary trees / A. W. F. Edwards & L. L. Cavalli-Sforza
Some problems of the taxometric approach / L. G. Silvestri & L. R. Hill
Quantitative characters in computer taxonomy / W. B. Kendrick
A critique of numerical taxonomy / A. D. J. Meeuse
Morphological integration and the meaning of characters in classification systems / E. C. Olson.