The CIA director reports that the Agency is in control of Liang Sicheng’s brother in the US and is using him to arrange a meeting between the two men in Mexico City, in which Liang Sicheng's defection would be raised as a real possibility.

A cable sent from CIA headquarters to an agency officer in Mexico City concerning Liang Sicheng and whether or not he could be persuaded to defect to the United States. Though Liang's name was not disclosed during the declassification process, the identifying details match Liang's biography.

An "information report" from a CIA officer in Mexico City concerning the possible opening of an Chinese Communist industrial trade fair.

This press release quotes Los Angeles Mayor Sam Yorty as praising the Mexican government for its effectiveness in clamping down on Communist guerrillas trained in North Korea, action he sees as part of a broader effort to eliminate Russian subversive activity in the hemisphere.

The treaty creating the Latin American Nuclear Free Zone (LANFZ) was signed at Tlatelolco, Mexico, on 14 February 1967. Taking a close look at key provisions, INR found that the entry into force provisions included loopholes which “unenthusiastic” states could use so the treaty did not cover their territory.

A heavily redacted letter from Ottawa reporting on foreign contacts made by Soviet film director Mikhail Kalatozov in Canada and Mexico.

Mexican and Brazilian representatives disagree on if peaceful nuclear explosions (PNEs) are allowed by the Latin American treaty.

Different points of Mexico and Brazil on the denuclearization treaty of Latin America

Disagreement between representatives of Mexico and the UAR on the non-aligned group developing a common position.

Mexican President Adolfo Lopez Mateos speaks on Mexico's place in international affairs.