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1931

Columnar section

1931

Columnar section

1931

Columnar section

1931

Columnar section

1931

Columnar section

1931

Columnar section

1931

Columnar section

1931

Columnar section

1931

Columnar section

1931

Columnar section

1931

Columnar section

1930

Columnar section of the Cold …

1930

Columnar section of the Cold …

1930

Columnar section of the Cold …

1930

Columnar section of the Cold …

1930

Columnar section of the Cold …

1930

Columnar section of the Cold …

1930

Columnar section of the Cold …

1930

Columnar section of the Cold …

1930

Triangulation system, area n …

1927

Reconnaissance map of the Sa …

1927

Reconnaissance map of the Sa …

1928

Primary triangulation, Sulph …

1929

[La Brea Creek

1929

[La Brea Creek

1929

[La Brea Creek

1931

[Assignment Map]

1931

[Assignment Map]