Salas, Gerald M. <br/><br/>
Chromosome analysis of in-vitro cultured human blood lymphocytes collected from naturally occurring radioactive materials (norm)-exposed workers in Pampanga  [manuscript] / 
Gerald M. Salas. 
 - Magalang, Pampanga :  Pampanga Agricultural College,  2011. 
 - 165 pages ;  27 cm.