APA

Sulphur Institute, . (1976). New uses for sulphur and pyrites. Symposium. Madrid, May 1976. Proc. London: Sulphur Institute.

Chicago

Sulphur Institute, . 1976. New uses for sulphur and pyrites. Symposium. Madrid, May 1976. Proc. London: Sulphur Institute.

Harvard

Sulphur Institute, . (1976). New uses for sulphur and pyrites. Symposium. Madrid, May 1976. Proc. London: Sulphur Institute.

MLA

Sulphur Institute, . New uses for sulphur and pyrites. Symposium. Madrid, May 1976. Proc. London: Sulphur Institute. 1976.