Systematic paleontology of Quaternary ostracode assemblages from the Gulf of Alaska, pt. 1: families Cytherellidae, Bairdiidae, Cytheridae, Leptocytheridae, Limnocytheridae, Eucytheridae, Krithidae, Cushmanideidae. U S Geological Survey Professional Paper, No. 1510 1990: 1-43. 13 [Zoological Record Volume 127]