Nicholson, A. (1953). Why don't the cities look all the way upstream?: Farmers, industry, everybody gains when an organization like the Brandywine Valley Association promotes conservation on the cropland where water problems begin. Washington.

Nicholson, Arnold. Why Don't the Cities Look All the Way Upstream?: Farmers, Industry, Everybody Gains When an Organization Like the Brandywine Valley Association Promotes Conservation On the Cropland Where Water Problems Begin. Washington, 1953.

Nicholson, Arnold. Why Don't the Cities Look All the Way Upstream?: Farmers, Industry, Everybody Gains When an Organization Like the Brandywine Valley Association Promotes Conservation On the Cropland Where Water Problems Begin. Washington, 1953.