F.Pickup , A.M.I.Prod.E, and M.A.Parker ඉංජිනේරු ඇදීම 01 - Hutchinson Publishing group Ltd London 1970 - 186p 1 - 2023-11-01 The Educational Publications Department Nat. Bib. No.: 0004938 Nat. Bib. Agency Control No.: PIC Universal Decimal Class. No.: 620