Tren, Richard.
Malaria and the DDT story / Richard Tren. - London : Institute of Economic Affairs, 2001. - 107 p. ; ill. ;. 20 cm. :
Includes bibliographical references.
0255364997
Malaria and the DDT story / Richard Tren. - London : Institute of Economic Affairs, 2001. - 107 p. ; ill. ;. 20 cm. :
Includes bibliographical references.
0255364997