State of the world, 1988 :

By Worldwatch Institute. New York : Norton, 1988 . xvii, 237 p. : , Includes index 24 cm. 0393025152 : | 9780393025156 | 039330440X (pbk) : | 9780393304404 (pbk)

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State of the world, 1989 :

By Worldwatch Institute. New York : Norton, 1989 . xvi, 256 p. ; , Includes index 24 cm. 0393026388 : | 0393305678

Place Hold on State of the world, 1989 :

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State of the world, 1988 :

State of the world, 1989 :