621 Will E Wilson, A Engineering science for technicians, the first two years [ London] longmans [ cl964] 149 p. diagrs. 20 cm <a id= "rdfa" about="http://bnjm.sld.cu/cgi-bin/item.py?idficha=bcuhcgrlyfof1100468" property = "oa:link" href="http://www.worldcat.org/oclc/ 6157209 ">WorldCat</a>