- secret inks
- A material used for writing that is not visible until treated by developing process; also referred to as sympathetic ink.
Forensic science glossary. John C. Brenner . 2012.
Forensic science glossary. John C. Brenner . 2012.
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Erich Vermehren — Erich Vermehren, also known as Erich Vermeeren de Saventhem or Eric Maria de Saventhem , (December 23, 1919 April 28, 2005) was an ardent anti Nazi and is best known as the German agent of the Abwehr, the German intelligence organization, whose… … Wikipedia
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