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Gamble, Donald S., Langford, Cooper H., Webster, G. R. Barrie, and Ware, George W., editor

Lavigne, J. Allen, Langford, Cooper H., Niki, H., editor, and Becker, K. H., editor

Gamble, Donald S., Langford, Cooper H., Underdown, Alan W., Kramer, C. J. M., editor, and Duinker, J. C., editor

Langford, Cooper H., Gamble, Donald S., Kramer, C. J. M., editor, and Duinker, J. C., editor