id	keyword
ap-9670	military
ap-9670	polish
ap-9670	czechoslovak
ap-9670	intelligence
ap-9670	army
ap-9670	war
ap-9670	poland
ap-9670	staff
ap-9670	enigma
ap-9670	department
ap-9670	world
ap-9670	french
ap-9670	officers
ap-9670	german
ap-9670	schools
ap-9670	education
ap-9670	praha
ap-9670	general
ap-9670	courses
ap-9670	state
ap-9670	růžek
ap-9670	isbn
ap-9670	services
ap-9670	cryptologic
ap-9670	mission