Yokoyama, Y.

Yano, E., Yokoyama, Y., Higashi, H., Nishii, S., Maeda, K., Koizumi, A., (1990), Health effects of volcanic ash - a repeat study, Archives of Environmental Health, 45(6), 367-373, 10.1080/00039896.1990.10118757
Yano, E., Higashi, H., Nishii, S., Koizumi, A., Yokoyama, Y., (1987), Pulmonary function of loggers exposed to the volcanic ash from Mt. Sakurajima, Japanese Journal of Public Health, 34, 251-254, Article in Japanese (English abstract)
Higashi, H., Yano, E., Yokoyama, Y., Nishii, S., Koizumi, A., Maeda, K., (1987), Seasonal variations in the responses to a respiratory symptom questionnaire: a study in an area exposed to volcanic ash, Japanese Journal of Public Health, 34, 453-458, Article in Japanese (English abstract)
Yano, E., Nishii, S., Yokoyama, Y., (1986), Chronic pulmonary effects of volcanic ash: An epidemiologic study, Archives of Environmental Health, 41(2), 94-99, 10.1080/00039896.1986.9937416