ISBN 7802479703 books & textbook
enterprise patent work practices (2) (Paperback)
BEI JING LU HAO ZHI SHI CHAN QUAN DAI LI YOU XIAN GONG SI
Intellectual Property Publishing House; 2 (May 1. /1991-01-01 Paperback
isbn-10: 7802479703 / isbn-13: 9787802479708
