por Tye, Joe [autor] | Trabal, Betty [traductor] | National Business Employment Weekly.
por Campbell, Susan M, 1941- [autor] | Wolfson, Leandro [traductor].
por Mendoza Núñez, Alejandro [autor].
por Baltes, Boris B [editor] | Rudolph, Cort W [editor] | Zacher, Hannes [editor].