Here are entered works on population shifts from an urban to a rural environment. Works on population shifts from a rural to an urban environment are entered under Rural-urban migration.
Here are entered general works on animals in urban areas. This heading may be divided geographically by names of individual regions, countries, states, etc. Works on animals in specific cities or other urban areas are entered under the heading Animals with the appropriate geographic subdivision.
Here are entered general works on plants in urban areas. This heading may be divided geographically by names of individual regions, countries, states, etc. Works on plants in specific cities or other urban areas are entered under the heading Plants with the appropriate geographic subdivision.
