xplaining Logarithms by Dan Umbarger - Brown Books Publishing Group , 2006

SURFANDO HOJE TIVE A GRANDE SATISFAÇÃO E ALEGRIA DE ENCONTRAR  A PAGINA WEB DO GRANDE MATEMATICO PROF. DAN UMBARGER

About the Author, Dan Umbarger

The author of Twenty Key Ideas in Beginning Calculus, Dan Umbarger, has taught various levels of mathematics from grade 5 to grade 12 for over 30 years. He currently teaches AP Computer Science at a Dallas area “majority minority” school. He is married and the proud father of three children: Jimmy, Terri, and Keelan. He is also the author of Explaining Logarithms and Explaining Bayes Theorem at www.mathlogarithms.com.
LINK BOOK
http://www.mathlogarithms.com/images/ExplainingLogarithms.pdf