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8
1
8
Serial [ñïèñàíèå]
Íàóêà è èçîáðåòåíèÿ
Ñúþç íà èçîáðåòàòåëèòå â Áúëãàðèÿ
Ñîôèÿ,Âàðíà
1945-1948
ìåñå÷íèê
ISSN:
Èçîáðåòåíèÿ è ðàöèîíàëèçàöèè
Latest Receipts:
Year
Receipts
1948
1-10
1947
1-10
1946
1-10
1945
1-10
1945
1-10
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