Human Resources are humans as a resource, as any resource cannot be utilised until a human has invented, discovered or upgraded it.
Human made resources are resources which are made by humans and which has a utility value.
natural resources are raw materials and land.
human resources are entrepreneurs and labor.
man made resources are refined raw materials that need additional value added work to become finished goods, such as raw steel, aluminum, and other commodities that are not simply taken directly out of the ground.
some might argue that capital is also a man made resource; being the plant and equipment used in the production process.
by adding capital to the equation, we have an explanation of all three scarce economic resources: land, labor and capital.