El enigma Tunguska

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute...

This is a reproduction of the original artefact. Generally these books are created from careful scans of the original. This allows us to preserve the book accurately and present it in the way the author intended. Since the original versions are generally quite old, there may occasionally be certain imperfections within these reproductions. We're happy to make these classics available again for future generations to enjoy!

A general and comprehensive overview of the main stages or periods of Puerto Rico's monetary history. Beginning from pre-Columbian period, and covering the "situado" subsidy, the monetary crisis throughout the nineteenth century, and the different monetary systems implemented before and after US intervention in 1898, and their effects in our numismatic legacy: provisional paper money, cob coins, perforated and counterstamped coins (fleur-de-lys), foreign coinage, the provincial silver coinage of 1895-1896, plantation and merchant tokens, and official banknotes, among other. Full-color...

El Libro De Los Muertos es una coleccion de textos funerarios de los antiguos egipcios. Traducido por primera vez al espanol, prologado y anotado por Juan Bautista Bergua que permite al lector un mejor entendimiento de su contenido, el contexto en que fue desarrollado y su importancia historica. El origen de "El Libro de los Muertos," nombre dado al texto por el egiptologo Karl Richard Lepsius, se encuentra en diversos papiros encontrados en las tumbas egipcias, aunque una parte del texto ha sido tomada directamente de los "Textos de las Piramides," una serie de inscripciones jeroglificas...