Prasong Tosranon. 1997. X-ray timer meter. , Mahidol University;
Prasong Tosranon. (1997) X-ray timer meter . Mahidol University/Bangkok.
Prasong Tosranon. X-ray timer meter. . Bangkok:Mahidol University, 1997.
Prasong Tosranon. (1997) X-ray timer meter . Mahidol University/Bangkok.