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• The process of evolution Paul R. Ehrlich

  

  The process of evolution

  Paul R. Ehrlich

  1963

• How to Know the Butterflies Paul R. Ehrlich

  

  How to Know the Butterflies

  Paul R. Ehrlich and Anne H. Ehrlich

  1961

• On the wings of checkerspots Paul R. Ehrlich

  

  On the wings of checkerspots

  Paul R. Ehrlich and Ilkka Hanski

  2004

• How to be a Survivor Paul R. Ehrlich

  

  How to be a Survivor

  Paul R. Ehrlich and Richard L. Harriman

  1971

• Population resources environment Paul R. Ehrlich

  

  Population resources environment

  Paul R. Ehrlich

  1970

• Man and the ecosphere Paul R. Ehrlich

  

  Man and the ecosphere

  Paul R. Ehrlich

  1971

• The golden door Paul R. Ehrlich

  

  The golden door

  Paul R. Ehrlich

  1979

• The machinery of nature Paul R. Ehrlich

  

  The machinery of nature

  Paul R. Ehrlich

  1987

• Introductory biology Paul R. Ehrlich

  

  Introductory biology

  Paul R. Ehrlich

  1973

• Humanity on a tightrope Paul R. Ehrlich

  

  Humanity on a tightrope

  Paul R. Ehrlich

  2010

• Betrayal of science and reason Paul R. Ehrlich

  

  Betrayal of science and reason

  Paul R. Ehrlich and Anne Ehrlich

  1998

• The population explosion Paul R. Ehrlich

  

  The population explosion

  Paul R. Ehrlich and Anne H. Ehrlich

  1990

• Life Paul R. Ehrlich

  

  Life

  Paul R. Ehrlich

  2023

• One with Nineveh Paul R. Ehrlich

  

  One with Nineveh

  Paul R. Ehrlich

  2004

• Human ecology Paul R. Ehrlich

  Human ecology

  Paul R. Ehrlich

  1973

• Human ecology; problems and solutions Paul R. Ehrlich

  

  Human ecology; problems and solutions

  Paul R. Ehrlich

  1973

• A world of wounds Paul R. Ehrlich

  A world of wounds

  Paul R. Ehrlich

  1997

• New world, new mind Robert Ornstein

  

  New world, new mind

  Robert Ornstein and Paul R. Ehrlich

  1989