TY - RPRT TI - Major-element chemistry, radiometric ages, and locations of samples from the Petersburg and parts of the Port Alexander and Sumdum quadrangles, southeastern Alaska AU - S. L. Douglass AU - J.H. Webster AU - P.D. Burrell AU - M. A. Lanphere AU - D. A. Brew PY - 1989 DO - 10.3133/ofr89527 UR - https://pubs.usgs.gov/publication/ofr89527 ID - ofr89527 ER -