TY - JOUR A1 - Venable, W. H. A1 - Stephenson, H. F. A1 - Terstiege, Heinz T1 - Factors affecting the metrology of retroreflecting materials PY - 1980 SN - 0003-6935 SN - 1539-4522 VL - 19 IS - 8 SP - 1242 EP - 1246 PB - Optical Society of America CY - Washington, DC AN - OPUS4-9407 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -