Books and government reports published at the time or by participants and eyewitnesses, all freely available online via HathiTrust.
"Red papers" of Mexico by
Diplomat's Wife in Mexico by Letters from the American embassy at Mexico city, covering the dramatic period between October 8th, 1913, and the breaking off of diplomatic relations on April 23rd, 1914, together with an account of the occupation of Vera Cruz
Diplomatic Dealings of the Constitutionalist Revolution of Mexico by
Experiences and observations of an American Consular Officer during the Recent Mexican Revolutions by as Mainly told in a Series of Letters written by the Author to his Daughter.
Facts submitted by the Committee of the American colony to President Wilson and Secretary of State Bryan by relative to the Mexican situation and the record of the Hon. Henry Lane Wilson.
Investigation of Mexican Affairs by
Manifesto Addressed by General Francisco Villa to the Nation by
Memorias del General Victoriano Huerta by In Spanish.
President Venustiano Carranza corrects statements made by Senator Knox ... in the Senate. by
Reply of Don Venustiano Carranza to the chief of the Northern division by Thee first chief of the Constitutionalist army, in charge of the executive power, to the Mexican people. Refutation of the manifest of General Francisco Villa.
Report by Venustiano Carranza by a, first chief of the Constitutionalist army) in the city of Querétaro, state of Querétaro, Méx., Friday, December 1st, 1916.
The situation in our dealings with General Victorianio [!] Huerta, at Mexico City by Address of the President of the United States, delivered at a joint session of the two houses of Congress, April 20, 1914 ...
With the First City Troop on the Mexican border by e Being the Diary of a Trooper, by George Brooke, 3rd.