McGraw-Hill Ency. Of Science & Technology 1971 Full Set 15. #355. These vintage books were apparently Library books, but the only Library notation or marking in them is on one page of one book. The covers are in very good condition, with the exception of volume four, which is frayed and scuffed at the top of the spine. Text blocks are lightly speckled with foxing, but end papers and Pages look great. This is a complete set of 15 volumes, including an index. See photos for detail