International patent classification : core level. (WIPO, 2006)
Algunos datos tomados de la cubierta--Contenido: v.1 Sections A and B: Human necessities, performing operations, tranporting--v.2 Sections C and D: Chemistry, metallurgy, textiles, paper--v.3 Sections E and F: Fixed constructions, mechanical engineering, lighting, heating, weapons, blasting--v.4 Sections G and H: Physics, electricity--v.5 Guide to the IPC--ISBN 92-805-1438-5 (v.1)--ISBN 92-805-1439-3 (v.2)--ISBN 92-805-1440-7 (v.3)--ISBN 92-805-1441-5 (v.4)--ISBN 92-805-1442-3 (v.5)