Ron Fridell – författare
Visar alla böcker från författaren Ron Fridell. Handla med fri frakt och snabb leverans.
6 produkter
Seven Wonders of Transportation
Av Ron Fridell
E-bok, 2010
747 kr
Lägg i varukorg
In every age, science and technology have advanced human civilization. From architecture to engineering, medicine to transportation, humans have invented extraordinary wonders. Transportation technology has seen significant changes over the centuries. Ancient people traveled on foot and on the …
Protecting Earth's Water Supply
Av Ron Fridell
E-bok, 2015
666 kr
Lägg i varukorg
From roaring oceans to trickling streams, water covers seventy percent of our planet! But did you know that less than one percent of Earth’s water is usable by humans? Most water on Earth is salt water. It can’t be used for drinking, bathing, or growing plants. We need freshwater. Yet about …
