_:B2479fbb22d388b5828833319d4a05acd . "Horst W.J." . "Rittel" . "Horst W.J. Rittel" . . . . "Rittel, Horst W.J." . . _:B2479fbb22d388b5828833319d4a05acd . _:B2479fbb22d388b5828833319d4a05acd . _:B2479fbb22d388b5828833319d4a05acd "2023-05-21"^^ . _:B2479fbb22d388b5828833319d4a05acd . _:B2479fbb22d388b5828833319d4a05acd . _:B2479fbb22d388b5828833319d4a05acd "067781152" . _:B2479fbb22d388b5828833319d4a05acd . _:B2479fbb22d388b5828833319d4a05acd . _:B2479fbb22d388b5828833319d4a05acd .