Precisionism and a Few of its Friends, by Roberta Smith
Interview with Charles Sheeler, conducted by Martin Friedman, in which Sheeler said he saw no affinity between his work and that of Georgia O'Keeffe's. Sheeler also said he had no interest in surrealism. He also seems to say he never saw any particular justification for the label, precisionist.
Precisionism according to Wikipedia.
Not a precisionist work, but nevertheless done by one of the group of artists stuck with that label:
"Havana Harbor, #3", Ralston Crawford