| Title | Author | PDF |
| The Eocene Molluscan Fauna from the Degari Coal Field in Central Baluchistan, West Pakistan |
Atsuyuki MIZUNO (225-246) |
20-04_01.pdf(6,889KB) |
| On the Seismic Prospecting in the Mizusawa District, Iwate Prefecture |
Kanenori ICHIKAWA (247-260) |
20-04_02.pdf(2,569KB) |
| Fig.3 |
20-04_02-Fig.3.pdf(6,384KB) |
| Observations on the Time Variations of Seismic Wave Velocities by Explosion Seismic Method (First Report) –On the Background of Experimental Field– |
Isao HASEGAWA and Susumu IIZUKA (261-294) |
20-04_03.pdf(3,404KB) |
| Correction of Text |
20-04_C.pdf(119KB) |
