Naptár 1991 /
Parcon 1991 /
Zdravotníctvo 1991. 1. diel
Zdravotníctvo 1991. 2. diel
Handbook of nanophysics. 6, Nanoelectronics and nanophotonics /
Handbook of nanophysics. 7, Nanomedicine and nanorobotics /
Handbook of nanophysics. 4, Nanotubes and nanowires /
Handbook of nanophysics. 5, Funkcional Nanomaterials /
Handbook of nanophysics. 1, Principles and methods /
Handbook of nanophysics. 2, Clusters and fullerenes /
Handbook of nanophysics. / 1, Principles and methods /
Handbook of nanophysics. 3, Nanoparticles and quantum dots /
NATO handbook
Handbook of Econometrics. Vol. 3 /
Production handbook /
The NGO handbook /
Handbook of psychopharmacology. Vol. 3, Biochemistry of biogenic amines /
Handbook of creativity /
Polymer Handbook /
Enzyme Handbook
Hoover´s handbook 1991 : profiles of over 500 major corporations /