3 1 20 Fuel and Power Clint Twist Additional Author mixed material 9780028645650 America Macmillan Reference USA 1997 cover_encyclopedia-of-science-9-fuel-and-power-20240918080141.jpeg The Environment Clint Twist Additional Author mixed material 9780028645636 America Macmillan Reference USA 1997 cover_encyclopedia-of-science-7-the-environment-20240918075320.jpeg Life on Eart Clint Twist Additional Author mixed material 9780028645605 America Macmillan Reference USA 1998 cover_encyclopedia-of-science-4-life-on-eart-20240906140912.jpeg