1. Curator Emeritus, Section of Vertebrate Paleontology, Carnegie Museum of Natural History 4400 Forbes Avenue, Pittsburgh, Pennsylvania 15213
2. Collection Manager, Section of Vertebrate Paleontology, Carnegie Museum of Natural History 4400 Forbes Avenue, Pittsburgh, Pennsylvania 15213
3. [Research Associate, Section of Vertebrate Paleontology, Carnegie Museum of Natural History] Department of Biology, California State University at San Bernardino, San Bernardino, California 92407
4. [Research Associate, Section of Vertebrate Paleontology, Carnegie Museum of Natural History] Pfarrgasse 53, 99869 Drei Gleichen, OT Großrettbach, Germany