1. Early and middle Bajocian (middle Jurassic) ammonites from southern Alaska Author/Creator: Imlay, Ralph W. 1908-1989. (Ralph Willard) Publication/Creation: Alexandria, VA : For sale by the Distribution Branch, U.S. Geological Survey Resource Type: Book Access & Availability: Loading
2. Callovian (Jurassic) ammonites from the United States and Alaska. : Descriptions and illustrations of cephalopods of Late Jurassic age Author/Creator: Imlay, Ralph W. 1908-1989. (Ralph Willard) Publication/Creation: Washington : U.S. Govt. Print. Off, 1953 Resource Type: Book Access & Availability: Loading