Ernst Mayr Quotes about Evolution
"The Dynamics of Evolution: The Punctuated Equilibrium Debate in the Natural and Social Sciences". Book by Albert Somit and Steven Peterson, p. 21-48, "Speciational Evolution or Punctuated Equilibria", 1992.
Ernst Mayr (1988). “Toward a New Philosophy of Biology: Observations of an Evolutionist”, p.457, Harvard University Press