1986 - Humans at Work (Paperback) ISBN-13: 9780671626662 ISBN-10: 0671626663 Genres: Literature & Fiction, Humor & Entertainment 2 1985 - Humans (Paperback) → Hardcover ISBN-13: 9780671602772 ISBN-10: 0671602772 Genres: Literature & Fiction, Humor & Entertainment 2 |