This article has now been updated. Please use the final version.
Genetic relationship between post-caldera and caldera-forming magmas from Aso volcano, SW Japan: Constraints from Sr isotope and trace element compositions
Vol.31 (1944) No. 5 and No.6 of the predecessor journal, "The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists" are available at this J-Stage site. (updated Aug. 2, 2018)