TY - CPAPER AU - P. Todorov TI - MODERN REMOTE SENSING GROUND TECHNICAL INSTRUMENTS FOR RAPID CREATION OF PRECISE 3D DIGITAL MODELS OF EXTENSIVE INACCESSIBLE AND DANGER AREAS T2 - 6th International Scientific Conference - SGEM PY - 2006 SP - 215 EP - 226 PB - SGEM Scientific GeoConference ER -