A collection of real life studies focusing on all sides of Well Engineering and Constructions. For beginners and professionals.

Mittelalter - damit verbinden wir Ritter, Burgen, Turniere und überhaupt eine bunte, faszinierende Zeit. freilich stellt das, was in Filmen oder Mittelaltermärkten prächtig und mehr oder weniger historisch richtig dargeboten wird, nur Ausschnite...

Seit Jahrtausenden gräbt der Mensch in den Tiefen der Erde nach Bodenschätzen wie Edelmetallen, Erzeh, Edelsteinen, Salz, Steinen, Kalk, Kies, Öl, Kohle und vielen anderen...

Im Laufe von Millionen Jahren haben Lebewesen unzählige Fähigkeiten und Strukturen entwickelt, die ihnen das Überleben sichern. Ihre Leistungen setzen uns immer wieder in Erstauen...

Seit es Menschen gibt, dilt es auch Verbrechen. Raub, Diebstahl oder Erpressung gehören dazu, zunehmend auch Gewalt und Geiselnahmen, im schlimsten Fall Mord. Jede Zeit bringt neue...

Viele kennen Gebirge, bei uns vor allem die Alpen, villeicht aus dem Urlaub - durch Wanderungen im Sommer oder Ski-...

It is a complete encyclopaedia of ships and ship building with lots of illustrations.

Teaching kids to do as the Romans did, this exciting guide to the ancient empire explores everything from togas and gladiators to Julius Caesar and the Coliseum. Written especially for younger readers, this hands-on book is a fantastic introduction to the Rome of antiquity. Through the 25 interactive projects and games, kids will learn how to host a Roman feast, make their own shields and tunics, and write a Roman play.

The faraway lands of the North and South Poles are examined in this revealing guide, enabling children to explore the coldest places on Earth from the warmth of their homes. From polar exploration and penguins to Inuit cultures and the tundra, simple yet thorough explanations are provided for a range of Arctic and Antarctic topics while copious vocabulary notes and fun factoids enrich the material...

It is rare enough to complete the iconography of butterflies in the world. There is an image more than 2000 species.

More than 1,800 cosmetics and toiletry formulations are detailed in Volume 1 of the Second Edition of this well-received and useful book. It is based on information obtained from industrial suppliers.

This Design Guide provides the information and resources necessary to design and install cross-linked polyethylene (PEX) water supply systems in residential buildings. It includes comprehensive design concepts and installation guidelines to increase the acceptance and proper use of PEX. This document is targeted to meet the needs of home builders, designers, and trade contractors. Its purpose is to introduce potential users and to enable current users to optimize their PEX plumbing and minimize system costs. In addition, it will allow code inspectors and homeowners to become familiar with the applications, performance characteristics, and benefits of PEX water supply systems.