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by Mueller, Guntram; Brent, Ronald I.
by Larson, Ron; Hodgkins, Anne V.
by Larson/Larson
by Wilson
by Bruce F. Torrence , Eve A. Torrence
by Stewart/Heuvers/Francis/Kuisti
by Larson, Ron
by Thomas, George B., Jr.; Weir, Maurice D.; Hass, Joel R.
by Steeb, Willi-Hans; Hardy, Yorick