1. El jurásico inferior de México y sus amonitas Author/Creator: Erben, Heinrich Karl Publication/Creation: [Mexico] : [publisher not identified], [1956] Resource Type: Book Access & Availability: Loading
2. Jurassic (Bathonian or early Callovian) ammonites from Alaska and Montana Author/Creator: Imlay, Ralph W. 1908-1989. (Ralph Willard) Publication/Creation: Washington : U.S. Govt. Print. Off, 1962 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 372-374. Access & Availability: Loading