Photocopies and hand-written notes collected by Donald Chaput, History Division, Natural History Museum of Los Angeles County,
during the years 1984-1988, as part of a biographical project related to Julius Kruttschnitt, Jr. Most of the materials are
from the Tucson office of ASARCO, where Kruttschnitt was headquartered from 1912-1930 (he was Manager, Southwest District
for ASARCO). Files cover Arizona, New Mexico and Mexico.