"Yursky and Lower Cretaceous Sernalopods of Northern Siberia" Author: Professor A.P. Pavlov Extended format (34 x 23 cm), soft cover. Description: This scientific study, published in the framework of the "Notes of the Imperial Academy of Sciences", is devoted to the study of fossil sernalopods (groups of cephalopods) of the Jurassic and Lower Cretaceous period, found on the territory of Northern Siberia. Material based on results Russian polar expedition of 1900-1903 under the leadership of Baron E.V. Toll. The paper presents descriptions of the findings, scientific conclusions, as well as 18 tables illustrating the material. This work is of great importance for geology and paleontology, especially for the study of ancient fauna of the Arctic. Limited Edition: Publications of the Imperial Academy of Sciences of the early 20th century, especially such highly specialized works as this one, were published in small editions. This makes them extremely rare in the modern market. Historical value: The book belongs to the era of active study of the Arctic and Northern Siberia. Materials based on the Russian polar expedition of 1900-1903 under the leadership of Baron E.V. Toll are of great importance for the history of Russian science and polar research. Scientific significance: The work of Professor A.P. Pavlov is devoted to Jurassic and Nizhnemelov sernalopods, which are important objects for the study of the evolution of marine ecosystems. Such studies have value for paleontologists, geologists and biologists involved in minerals. Antique status: Additional value adds its belonging to the "Notes of the Imperial Academy of Sciences." Artistic and collectible meaning: The original printing and design of the publications of the Academy of Sciences of that time are highly valued by collectors for their aesthetic quality and historical significance.