The challenge / Mahathir Mohamad. Mohamad, Mahathir 1925- Mahathir bin Mohamad, 1925- Cabaran! DS592 .M17 1986 301.0899923 MOC Based on: Cabaran! Includes index. Petaling Jaya, Selangor, Malaysia : Pelanduk Publications, c1986. c1986. 1986 Text 170 p. ; eng Malaysia.