Hackamore, Two Rein, Bridle: How the Vaqueros Made a Horse
The California vaqueros took years to finish a horse, moving it by stages from the hackamore to the spade bit. The stage in the middle gave this publication its name.
Vaqueros and Buckaroos
The stock horse tradition of Spain, Mexico, California and the Great Basin: hackamore, two rein and bridle.