Jim Ollhoff
1959
100 works on record
Works
Wyoming
Weapons
South Dakota
Ninja
Nevada
West Virginia
Arizona
Idaho
Texas
Wind and water
Fossil fuels
Nebraska
Solar power
North Dakota
Alaska
Wisconsin
Sport karate
Samurai
Washington
Martial arts around the globe
Masters & heroes
Geothermal, biomass, and hydrogen
Missouri
Colorado
World in crisis
South Carolina
Utah
Connecticut
Kung fu
Martial arts movies
Puerto Rico
Hawaii
Montana
The flu
Other renewable sources of energy
Delaware
Grappling
Karate
Tennessee
Washington, D.C
Getting along
Florida
Filling the family tree
Technological solutions
Fossil fuels
Social solutions
Years of slavery
Beginning genealogy
Climate change
DNA
Wind and water
World in crisis
Climatic changes
Using your research
Norse
Solar power
Stepping in Wholes
Water and ice
The Black Death
Myths and controversies
The germ detectives
The science
Smallpox
Malaria
Exploring immigration
Collecting primary records
Living in a warmer world
Getting Along
The World of Horror
Geothermal, biomass, and hydrogen
What are germs?
Japanese mythology
Chinese mythology
The digestive system
Climate change
Pioneers of equality
Native American mythology
The Civil War
Exploring immigration
Living in a warmer world
Police
The skin
Building a new world
Mayan and Aztec mythology
The heart
The Civil War
Courage and growth
Ancient America
The Civil War
The Civil War
The conquistadors
Ear, nose, and throat
Climate change
South Pacific mythology
Conflicts and independence
Myths and controversies
Identity and civil rights
European mythology
The brain
Middle Eastern Mythology