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by Stock, Catherine McNicol; Johnston, Robert D.
by Stock, Robert
by Barash, Paul G.; Cullen, Bruce F.; Stoelting, Robert K.; et al.
by Stock, Robert J.
by Michael Schillmeier, Robert Stock, and Beate Ochsner
by Barash, Paul G.; Cahalan, Michael K.; Cullen, Bruce F.; et al.
by Ochsner, Beate; Nikolow, Sybilla; Stock, Robert
by Robert Stock
by Beate Ochsner; Sybilla Nikolow; Robert Stock