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by Randall R. Cottrell; Denise Seabert; Caile Spear; et al.
by Cottrell, Randall R.; Girvan, James T.; McKenzie, James F.; et al.
by Cottrell, Randall R.; Girvan, James T.; McKenzie, James F.
by Butler, J. Thomas
by Editor: Alan Cribb (Univ. of Manchester, UK); Editor: Peter Duncan (formerly Chair of the Principles of Practice group of the Society of Heath Education)
by Cottrel; Girvan