E.T. Flores & H.J. Wolff

year of pub­li­ca­ti­onISBNauthor(s)title
1988978-971-91131-0-2Edith T Flores · Hans J WolffEinführung in die Struktur des Tagalog (Filipino)
1989978-971-91131-1-9Hans J WolffWörterverzeichnis Deutsch-Tagalog
  ''978-971-91131-2-6Hans-Juergen WolffPhilippine directory of occupational health and safety
1990978-971-91131-4-0   ''A bibliography of occupational health and safety in the Philippines (1949-1989)