K. Ohta

Overview of the 1990–1995 eruption at Unzen Volcano

S. Nakada, H. Shimizu, K. Ohta, 1999 .

Annual Contribution of Volcanic Sulfur Dioxide Emissions to the Atmosphere in Japan

Y. Tonooka, K. Ohta, S. Fujita, 1992 .

SEISMIC OBSERVATIONS AND INFRARED THERMAL SURVEYS OF THE 1990-1993 ERUPTION OF UNZEN VOLCANO

T. Matsushima, H. Shimizu, K. Ohta, 1993 .

The 1990-1992 eruptive activity at Unzen Volcano

K. Ohta, 1993 .

Unzen Volcano : the 1900-1992 eruption

T. Esaki, K. Nagao, M. Hirano, 1992 .

CONCEPT OF "DAILY TRAVEL TIME" (DTT) AND ITS APPLICABILITY TO TRAVEL DEMAND ANALYSIS

R. Katiyar, K. Ohta, R Katiyar, 1993 .