Comparative paleontology and stratigraphy of Valanginian Polyptychitinae and Simbirskitinae in Sverdrup Basin (Arctic Canada) and Lower Saxony Basin (northwest Germany)J. A. Jeletzky · First published 1988Open the Tome
Comparative Paleontology and Stratigraphy of Valanginian Polyptychitinae and Simbirskitinaie in Sverdrup Basin (Arctic Canada) and Lower Saxony Basin (Northwest Germany)Geological Survey of Canada. · First published 1987Open the Tome