Map showing depth to top of middle zone, Chad formation, Bornu and Dikwa Emirates, northeastern Nigeria / [peta]

Eitemau Tebyg

• Map showing depth to base of upper zone, Chad formation, Bornu and Dikwa Emirates, northeastern Nigeria / [peta]
  gan: Miller, R. E.
• Map showing depth to water in upper zone, Chad formation, Bornu and Dikwa Emirates, northeastern Nigeria / [peta]
  gan: Miller, R. E.
  Cyhoeddwyd: (1965)
• Map showing availability of artesian water in middle-zone, Chad formation, Bornu and Dikwa Emirates, northeastern Nigeria / [peta]
  Cyhoeddwyd: (1968)
• Map showing configuration of the piezometric surface of middle zone, Chad formation, Bornu and Dikwa Emirates, northeastern Nigeria / [peta]
  Cyhoeddwyd: (1968)
• Map showing relation of piezometric surface of the middle zone Chad formation to land surface, Bornu and Dikwa Emirates, northeastern Nigeria / [peta]
  Cyhoeddwyd: (1965)