International Conference on Bituminous Coal Pittsburgh. (1929). Proceedings of the second International conference on bituminous coal. [publisher not identified].
Chicago Style (17th ed.) CitationInternational Conference on Bituminous Coal Pittsburgh. Proceedings of the Second International Conference on Bituminous Coal. [Pittsburgh]: [publisher not identified], 1929.
MLA (9th ed.) CitationInternational Conference on Bituminous Coal Pittsburgh. Proceedings of the Second International Conference on Bituminous Coal. [publisher not identified], 1929.
Warning: These citations may not always be 100% accurate.