By Pierre Gilbert...[et.al] By Pierre Gilbert...[et.al by Karl Ruhrberg...[et.al] by Sabine Folle...[et.al.] edited by Ferre, Albert...[et al.] by David Else...[et.al] by Edmund Hillary...[et.all. by Edmund Hillary...[et.all.] by George S.Keyes...[et.al.] by Karl Ruhrberg...[et.al