Treatise Online no. 78: Part M, Chapter 21: History of the Study of Fossil Coleoidea Treatise Online no. 78: Part M, Chapter 21: History of the Study of Fossil Coleoidea
Treatise Online no. 148: Part M, Chapter 23B: Systematic Descriptions: Aulacoceratida Treatise Online no. 148: Part M, Chapter 23B: Systematic Descriptions: Aulacoceratida