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1
Exercises in helping skills : a manual to accompany The skilled helper, sixth edition / Gerard Egan.
Pacific Grove, Calif. : Brooks/Cole, 1998.
viii, 177 p. ; 28 cm.
2
The skilled helper : a systematic approach to effective helping / Gerard Egan.
Pacific Grove, Calif. : Brooks/Cole Pub. Co., c1990.
xviii, 445 p. : ill. ; 25 cm.