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Walther
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Walther Pistols
While the PP and PPK were intended for police work, the Walther P 38 was produced for the Germany military; all three pistols have garnered a formidable international reputation since the 1930s. The innovative Walther PP (Polizeipistole), a double-action semi-automatic pistol intended for the law-enforcement market, became available in 1929 and went on to arm the police of several European countries in the 1930s. Its smaller cousin the PPK, more readily concealed for undercover work but with reduced magazine capacity, was produced from 1931. Intended to replace the P 08 Luger, the Walther P 38 was issued from 1940 and equipped the armed forces of Germany and other countries during and after ...
Earth's Natural Resources
Earth's Natural Resources provides a thorough overview of the subject and details how natural resources relate to individuals and our society. It discusses how the Earth's natural resources form and change over time, how they are extracted for human use, and how we can continue to sustainably use them with our ever-growing global population. The text begins with the basics of energy-giving resources such as oil, natural gas, and coal, as well as alternative energy sources and nuclear power. It goes on to cover the earth's abundant and scarce metals, followed by elements used in agriculture, water and its distribution, quality, and usage. The final section highlights soil composition, mineral...
Essentials of Geochemistry
Updated throughout with the latest data and findings, the Second Edition of Essentials of Geochemistry provides students with a solid understanding of the fundamentals of and approaches to modern geochemical analysis. The text uses a concepts of chemical equilibrium approach, which considers the reactions that occur as a result of changes in heat production and pressure within the Earth to introduce students to the basic geochemical principles. This text is for those who want a quantitative treatment that integrates the principles of thermodynamics, solution chemistry, and kinetics into the study of earth processes. This timely text contains numerous examples and problems sets which use SUPCRT92 to allow students to test their understanding of thermodynamic theory and maximize their comprehension of this prominent field. New sections introduce current “hot” topics such as global geochemical change with the short and long term carbon cycle, carbon isotopes and the Permo-Triassic extinction event, kinetics and the origin of life and the use of boron and nitrogen isotopes.
Walther on Mercy
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Uwe Walther
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