Normale Ansicht MARC ISBD

Evolution of patent filing acrtivities in the USA : a contribution to the study and assessement of technological trends in the USA from 1969 to 1974 based on a statistical analysis of patentsa / Mitarb.: Hans Grevnik ; Hermann Kronz

Von: Verlag: Brussels, 1980Beschreibung: IV, 132 SSchlagwörter: