1999 - Chemical Operator's Portable Handbook (Paperback) ISBN-13: 9780070063693 ISBN-10: 0070063699 Genres: Religion & Spirituality, Science & Math, Engineering & Transportation, By Publisher ? 1996 - Chemical Technicians' Ready Reference Handbook (Hardcover) → Hardcover ISBN-13: 9780070571860 ISBN-10: 0070571864 Genres: Reference, Science & Math, Engineering & Transportation ? |