Vintage First Edition 1942 "The Calculus" by H. J. Ettlinger and M.B. Porter, University of Texas "The authors are presenting in this book a one year's calculus course, following in the main the present course as given in their classes an the University of Texas." Edited by Edwin R. Smith, The Iowa State College Hardback 317 pages Copyright The Dryden Press 1942 Approx 8.5 x 6 x 1 inches SKU BOB-%-07-25-068 Good condition. Some discoloration of the pages due to age. Slightly worn corners and edges. Some notes on the inside front cover. See the pictures. Yes, we combine orders for shipping whenever possible. If did not combine the shipping on your order correctly when we combine the items and check the shipping, if it is less than the shipping charges that you paid, we will issue you a refund for the difference.