Thackray, A., & Crow, A. B. (1999). Donald Frederick and Mildred Topp Othmer: A commemorative of their lives and legacies. Chemical Heritage Foundation.
Chicago Style (17th ed.) CitationThackray, Arnold, and Amy Beth Crow. Donald Frederick and Mildred Topp Othmer: A Commemorative of Their Lives and Legacies. Philadelphia: Chemical Heritage Foundation, 1999.
MLA (8th ed.) CitationThackray, Arnold, and Amy Beth Crow. Donald Frederick and Mildred Topp Othmer: A Commemorative of Their Lives and Legacies. Chemical Heritage Foundation, 1999.
Warning: These citations may not always be 100% accurate.