2002 - Conversations on the Dark Secrets of Physics (Paperback) → Hardcover ISBN-13: 9780738207650 ISBN-10: 0738207659 Genres: Science & Math, Engineering & Transportation ? 1991 - Conversations on the Dark Secrets of Physics (Hardcover) → Paperback ISBN-13: 9780306437724 ISBN-10: 0306437724 Genre: Science & Math ? |