Lines of Equal magnetic declination and of equal annual change in Alaska

Eitemau Tebyg

• Lines of equal magnetic declination and of equal annual change in the United States for 1905
  gan: Estados Unidos Coast and Geodetic Survey, et al.
  Cyhoeddwyd: (1905)
• Base map of the United States
  gan: Estados Unidos Coast and Geodetic Survey, et al.
  Cyhoeddwyd: (1909)
• Sketch of general progress
  gan: Estados Unidos Coast & Geodetic Survey, et al.
  Cyhoeddwyd: (1909)
• Base map od the United States
  gan: Estados Unidos Coast and Geodetic Survey, et al.
  Cyhoeddwyd: (1909)
• Base map of the United States
  gan: Estados Unidos Coast and Geodetic Survey, et al.
  Cyhoeddwyd: (1909)