This image shows the traditional method for weaving Navajo rugs, a very popular and successful product for the Navajo nation.
The description states:
K102 — NAVAJO RUG WEAVER
Navajo rugs are worked on in the Navajo Hogan in winter and outside under a tree in the summer. Wool is sheared from the sheep, sorted and washed, carded to make fibers fine in one direction and worked into a cord used for weaving. These rugs are made completely of wool, and famed for their beauty and durability.
–This image likely dates from the 1950s.