Since new copies are generally not in production, your best bet is to find a used copy, often in very good condition. Several reliable online marketplaces and library networks are excellent places to begin your search:
The book focuses on the foundational, physics-based methods of balancing that have stood the test of time. While it doesn't cover the latest software algorithms, the mechanical principles it teaches are the bedrock upon which all modern systems are built. A practitioner who understands the fundamentals from this book will be well-equipped to use any current balancing instrument. machinery vibration balancing victor wowk pdf new