Vliegschool te Kalidjati (de heer Hilgers met zijne leerlingen) - Seven air force officers before biplane, three of five in back row in white jackets … Bergartillerie in stelling - Engineer with transit; white dog right foreground; artillery crews setting op white markers down the line - Negatieven en fotoafdrukken betreffende … Bergartillerie in stelling - Engineer with transit; white dog right foreground; artillery crews setting op white markers down the line - Negatieven en fotoafdrukken betreffende …
