Laboratory manual in questioned documents examination 
Leyaley, Julienne Sacyaben. 
 -  Wiseman's Books Trading, Inc.  2020 
 - iv, 42 pages 
978-6-214-18131-5
Forensic sciences.
F 363.25 L681 2020
                        978-6-214-18131-5
Forensic sciences.
F 363.25 L681 2020