found: Work cat.: Murao, S. Ichirei reiichi, 2005(iwabue)
found: De Ferranti, H. Japanese musical instruments, 2000(iwabue; small ... flutes of stone)
found: Power of Sound and Word WWW site Nov. 15, 2006(iwabue,or stone flute)
found: Nihon ongaku daijiten, 1989:p. 20 (ishibue)
found: Google search, Dec. 19, 2007(iwabue; ishibue; stone flute; stone whistle)
notfound: Grove Music Online WWW site Nov. 15, 2006;Sachs, C. Real-Lexikon der Musikinstrumente, 1962;Marcuse, S. Musical instruments, c1975;New Grove. dict. of musical instruments;Malm, W.P. Traditional Japanese music and musical instrument, 2000