TY - BOOK AU - van Renesse, Rudolf, ed. TI - Optical Security and Counterfeit Deterrence Techniques VI T2 - Proceedings of SPIE; V. 6075 SN - 9780819461155 (Print) PY - 2006/// CY - Washington, USA PB - SPIE UR - https://www.spiedigitallibrary.org/conference-proceedings-of-spie/6075 ER -