Portman, Michael E. Generalized anxiety disorder across the lifespan an integrative approach / [electronic resource] : by Michael E. Portman. - New York, NY : Springer-Verlag New York, 2009. - 194 p. : ill., digital ; 24 cm. ISBN: 9780387892436 (electronic bk.) 9780387892429 (paper) Subjects--Topical Terms: Anxiety disorders.Psychotherapy and Counseling.Psychotherapy.Clinical Psychology.Psychology. LC Class. No.: RC531 / .P67 2009 Dewey Class. No.: 616.8522