Senses and sensation -- Juvenile literature

Forest fires -- Juvenile literature Forest fire -- Prevention and control -- Juvenile literature

Volcanoes -- Juvenile literature Volcanism -- Juvenile literature

Thunderstorms -- Juvenile literature Tornadoes -- Juvenile literature Hurricanes -- Juvenile literature

Paleontology -- Methodology

Underwater exploration Deep diving

Mammals -- Tanzania -- Serengeti Plain Safaris -- Tanzania -- Serengeti Plain

Working dogs

Planets Solar system

Simple machines -- Juvenile literature

Saladin, Sultan of Egypt and Syria, 1137-1193 -- Juvenile literature Saladin, Sultan of Egypt and Syria, 1137-1193 Crusades -- Juvenile literature Kings, queens, rulers, etc. -- Biography Crusades

Chemists -- Poland -- Biography -- Juvenile literature Discoveries in science -- Juvenile literature Scientists -- Biography -- Juvenile literature Discoveries in science Scientists