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| | Commercial and Residential Districts (from city) -- Britannica Student Encyclopedia |
 | | Cities often seem to be formed of several districts patched together, and urban zoning laws (which restrict the types of construction, houses, and businesses allowed in some zones of the city) may reinforce the differences among these districts. |
 | | The district, which contains approximately 312,000 acres (126,000 hectares) of irrigable land, occupies the western portion of the Mayrán Basin; it was named for the shallow lakes (lagunas) formed on the plain. |
 | | A city is a concentrated center of population that includes residential housing and, typically, a wide variety of workplaces, schools, and other permanent establishments as well as a transportation network. |
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