What are two examples of pioneer groups who used cooperation to overcome hardship

Which organization worked for the rights of migrant farm workers?

Match each model with its name and the name of the scientist who created it.

Historians have recently discovered a historical journal published in the early twentieth century. the journal contains facts based on original sources about the downfall of the early byzantium empire. historians consider this long-lost journal to be a breakthrough in their understanding of the byzantium empire. based on this information, the journal is a source.