21St Century Astronomy 5Th Edition  by Laura Kay,Stacy Palen,George Blumenthal

21St Century Astronomy 5Th Edition by Laura Kay,Stacy Palen,George Blumenthal

Astronomy is a natural science that studies celestial objects and phenomena. It applies mathematics, physics, and chemistry in an effort to explain the origin and evolution of planets, stars, galaxies, nebulae, and cosmology. The 21st century has seen significant advances in astronomy due largely to technology. This edition of 21st Century Astronomy provides a comprehensive…

21 Indispensable Qualities of a Leader   by John C. Maxwell

21 Indispensable Qualities of a Leader by John C. Maxwell

A leader is someone who influences others to achieve a common goal. A leader must have certain qualities in order to be effective. These qualities are: integrity, intelligence, self-confidence, determination, and the ability to inspire others. Integrity is the foundation of a leader’s character. It is essential for a leader to be honest and have…

2018 Uniform Plumbing Code  by International Association of Plumbing And Mechanical Officials Iapmo

2018 Uniform Plumbing Code by International Association of Plumbing And Mechanical Officials Iapmo

The IAPMO Group is a nonprofit organization that develops and maintains the Uniform Plumbing Code (UPC). The UPC is a model code that provides minimum requirements for the design and installation of plumbing systems. The IAPMO Group also offers training, certification, and technical assistance to plumbing professionals. The 2018 Uniform Plumbing Code (UPC) contains significant…

2017 National Construction Estimator by Richard Pray

2017 National Construction Estimator by Richard Pray

If you’re in the construction business, then you know that estimating is key to success. And if you’re looking for the most accurate and up-to-date construction costs, look no further than the 2017 National Construction Estimator. This essential reference tool contains detailed cost data for every aspect of both residential and commercial construction. Whether you’re…