Modern Refrigeration and Air Condition. Althouse and Carl H. Some yellowing around the edges of paper. Cover and binding show wear consistent with age. Some pages are dog eared. Some pen on inside first page. No other writing found on inside of book. Does not include any props in photos. Please feel free to contact me with any questions you may have. Any very noticeable defects or marks will be noted in the descriptions. Thank you for shopping.