Total number of photos: 25617

Details for Boyan Penkov

Boyan Penkov, Ivor Owen Grattan-Guinness, Christoph J. Scriba, Martin Barner, Eberhard Knobloch

- B. Penkov
- I. O. Grattan-Guinness
- C. J. Scriba
- M. Barner
- E. Knobloch
- (1988)

Boyan Penkov

- B. Penkov
- (1988)

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