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