Cover | Title | Year |
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 |
PROVA DELL'ESISTENZA DEI DISCHI VOLANTI Originally published as: UN CASO PERFECTO, 1969 , Translated (from the Spanish/Catalan) by Marina BARBERIS |
1972 |
 |
I MISTERI DEI DISCHI VOLANTI Originally published as: EL GRAN ENIGMA DE LOS PLATILLOS VOLANTES, 1966 , Translated (from the Spanish/Catalan) by Marina BARBERIS |
1973 |
 |
GLI UFO PROCESSO CON TESTIMONI Originally published as: PROCESO A LOS OVNI, 1969 , Translated (from the Spanish/Catalan) by Fabio PANICHI |
1975 |
 |
I MISTERIOSI TRIANGOLI DELLA MORTE - Dalle Bermuda al Giappone Originally published as: LOS DOCE TRIÁNGULOS DE LA MUERTE, 1976 , Translated (from the Spanish/Catalan) by Dario PICCOTTI |
1978 |