series of educational works provided in multimedia format, namely video discs, video tapes, and CD-ROM software on the subject of economics

'cd':16 'cd-rom':15 'disc':11 'econom':23 'educ':3 'format':8 'multimedia':7 'name':9 'provid':5 'rom':17 'seri':1 'softwar':18 'subject':21 'tape':13 'video':10,12 'work':4

printed teacher's guides and student guides for secondary students on the subjects of economics, namely producing, exchanging, consuming, saving and investing capital

'capit':23 'consum':19 'econom':15 'exchang':18 'guid':4,7 'invest':22 'name':16 'print':1 'produc':17 'save':20 'secondari':9 'student':6,10 'subject':13 'teacher':2

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