00571nam 22002053 4500 170109 978-1-4000-7839-4 170109 20140304d u||y0frey50 ba eng US ||||||||||||| Learned Optimism How to Change Your Mind and Your Life Martin E.P.Seligman New York Vintage Books 2006 319 p. Dezvoltarea personală 37223 Filosofia vieții 13639 159.923.2=111 37500 Seligman Martin E.P. BK 45