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Table 3 The hierarchical spatial relationships between blocks and counties and between blocks and congressional districts

From: U.S. congressional district cancer death rates

County

Block

Congressional district

County A

Block A1

 
 

Block A2

 
 

Block A3

 
  

Congressional district #1

 

...

 

County B

Block B1

 
 

Block B2

 
 

Block B3

 
 

...

 

County C

Block C1

Congressional district #2

 

Block C2

 
 

Block C3

 
 

...

 

...

...

...