Between 1957 and 1967, he first was a research social scientist in the Mental Health Research Institute at the University of Michigan, focusing on systems theory, and then a professor in Michigan's department of natural resources, School of Conservation.
He first was a research social scientist in the Mental Health Research Institute at the University of Michigan, focusing on systems theory in Michigan's department of natural resources. This was between 1957 and 1967. He first was a research social scientist in the Mental Health Research Institute at the University of Michigan, focusing on then a professor in Michigan's department of natural resources. This was between 1957 and 1967. Natural resources were School of Conservation.