http://localhost:8080/xmlui/handle/123456789/1765 Sat, 04 Apr 2026 14:10:18 GMT 2026-04-04T14:10:18Z http://localhost:8080/xmlui/handle/123456789/1766 Understanding Depression Klein, Donald The aim of this book is to explain what biological depression is and to clarify the difference between depression, a normal emotion, and biological depression, and illness. Fri, 01 Jan 2010 00:00:00 GMT http://localhost:8080/xmlui/handle/123456789/1766 2010-01-01T00:00:00Z