List of Bulgarian inventors and discoverers

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This is a list of Bulgarian inventions.

The Bulgar calendar was a calendar system used by the old Bulgarians to measure the duration of the year. It was acknowledged by UNESCO as the most accurate ancient calendar[citation needed].

References[edit]

  1. ^ Linde, Arvid, 2011, Preston Tucker & Others: Tales of Brilliant Automotive Innovations, Veloce Publishing PLC, ISBN 978-1-84584-017-4
  2. ^ BULGARIAN SCIENTIFIC THOUGHT AND PROGRESS IN THE WORLD, ADVANCES IN BULGARIAN SCIENCE - 2-2005
  3. ^ Peter D. Petroff Dies at 83; Devised a Digital Wristwatch