Letter concerning steel production

MLA

Phillipps, Thomas, et al. Letter concerning steel production. 1779.

APA

Phillipps, T., Kraus, H., Stanitz, J., Schoenberg, L. & Lawrence J. Schoenberg Collection (University of Pennsylvania). (1779). Letter concerning steel production. 1779.

Chicago

Phillipps, Thomas, Hans Peter Kraus, John D. Stanitz, Lawrence J. Schoenberg and Lawrence J. Schoenberg Collection (University of Pennsylvania). Letter concerning steel production. 1779.