Vista normal
Vista MARC
Timmermann, Helga (Nombre personal)
Kollhoff, examples, c1998: p. 203 (Helga Timmermann)
RLIN ARF, June 17, 1999 (Timmermann, Helga; West German architect)
Kollhoff & Timmermann architetti, c2003: p. 431 (Helga Timmermann, b. 1953 in Germany)