Volcanic ash and aviation safety : Proc.of the 1st Intern.symp.on volcanic ash and aviation safety Washington,July 1991 / Ed. T. J. Casadevall, 1994. - IX,450 p. p. - Текст : непосредственный.
Program and abstracts; July 8-12, 1991 / International symposium on volcanic ash and aviation safety (1st ; 1991 ; Seattle,Wa) , 1991. - IV,58 p. p. - Текст : непосредственный.