Metropolitan Manila Sewerage System.
| Format: | Map | 
|---|---|
| Language: | English | 
| Published: | Manila
          Board of Technical Surveys and Maps
    
        [19--n]. | 
| Subjects: | 
| Format: | Map | 
|---|---|
| Language: | English | 
| Published: | Manila
          Board of Technical Surveys and Maps
    
        [19--n]. | 
| Subjects: |