PT Unknown AU Ave, M Bohacova, M Daumiller, K Di Carlo, P Di Giulio, C San Luis, PF Gonzales, D Hojvat, C Hörandel, JR Hrabovsky, M Iarlori, M Keilhauer, B Klages, H Kleifges, M Kuehn, F Monasor, M Nozka, L Palatka, M Petrera, S Privitera, P Ridky, J Rizi, V D’Orfeuil, BR Salamida, F Schovanek, P Smida, R Spinka, H Ulrich, A Verzi, V Williams, C TI Precise Measurement of the Absolute Fluorescence Yield SE International Symposium on the Recent Progress of Ultra-High Energy Cosmic Ray Observation, UHECR2010; Aichi; Japan; 10 December 2010- 12 December 2010 PY 2011 BP 29 EP 33 VL 1367 DI 10.1063/1.3628710 LA english ER