Chapter 6Statistical Groupings of States and Counties
6-1
Historical Perspective
6-3
Proposals for Changes in the Future
6-22
Chapter 7Puerto Rico and the Outlying Areas
7-1
Background
7-1
Geographic Entities
7-9
Chapter 8County Subdivisions
8-1
Background
8-2
Establishing and Maintaining County Subdivisions
8-11
Regional Variations in Types of MCDs
8-20
Identification of County Subdivisions in the 1990 Census
8-26
Relationships to Other Geographic Entities
8-30
Chapter 9Places
9-1
Incorporated Places
9-2
Census Designated Places
9-20
Place Codes
9-31
Chapter 10Census Tracts and Block Numbering Areas
10-1
Background
10-1
Census Tract and BNA Criteria
10-4
Census Tracts and BNAs for the 1990 Census
10-9
Relationships to Other Geographic Entities
10-15
Chapter 11Census Blocks and Block Groups
11-1
History of Small Areas in U.S. Censuses
11-2
Census Block and Block Group Delineation for the 1990 Census
11-7
Relationships to Other Geographic Entities
11-16
Census Block Configurations
11-19
ivTable of Contents
