Unesco
World guide to technical information and documentation services : guide mondial des centres de documentation et d, information techniques - Paris: Unesco, 1969. - 287p.
PB
Documentation-Directories
029 / UNW
World guide to technical information and documentation services : guide mondial des centres de documentation et d, information techniques - Paris: Unesco, 1969. - 287p.
PB
Documentation-Directories
029 / UNW