| Monographs of COVENT GARDEN (1958) Monographs of TEATRO ALLA SCALA (1964) DICTIONAR ENCICLOPEDIC ROMAN (1962, Rumänien) UNVERGÄNGLICHE STIMMEN, by K. J. Kutsch & Leo Riemens (Sängerlexikon, 1966, BRD) TEATRALNAYA ENCYCLOPEDIA, by P. A. Markov (Sowjetunion, 1967) THE ART OF SINGING - ISKUSTVO PENYA, by I. K. Nazarenko (1968 Anthology, Sowjetunion) THE VICTOR BOOK OF THE OPERA - Metropolitan Encyclopedia (1968) MIC DICTIONAR ENCICLOPEDIC (1972, Rumänische Edition) WHO'S WHO IN THE WORLD (1971/73, Chicago, USA) |