Ladas, S.P. Patents,trademarks,and related rights: national and international protection Vol 1 - Harvard University Press Cambridge 1975 - ix,827-1482p. - National protection International protection Paris union World wars American conventions ISBN: 0-674-65775-6 Nat. Bib. No.: 3415 Nat. Bib. Agency Control No.: 608.3 PAT Subjects--Topical Terms: Engineering & Technology Universal Decimal Class. No.: 608.3