Note: there are too many entries in this category and all its subcategories combined. To obtain a list of structures please go through one of the subcategories.
There currently is no long description, though one is being prepared.
There currently is no relevant literature listed.
Netherlands (2000), added on 13/05/2013
Bangladesh (1961), added on 30/04/2013
USA (1974), added on 26/04/2013