| LC control no. | n 80100666 |
|---|---|
| Personal name heading | Helfenstein, Heinrich |
| Found in | Hofer, P. Paul Hofer an der Architekturschule, 1980 (a.e.) verso t.p. (Heinrich Helfenstein) Valerio Olgiati, 2000: table of contents (Heinrich Helfenstein) p. 83 (b. 1946; specializes in architectural photography) |
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