Adela Biderman was deported on April 24, 1942 and on transport 39. More information will be research under "The Ghetto" tab.
How We Found Adela Biderman:
When I first typed in Adela Biderman's name, the single search result came up. Luckily, the date of birth given for that Adela Biderman was in the year of 1928, which was within the date range of the Adela Biderman who signed the album. I also saw the occuaption of the Adela Biderman that showed up on the search result and it was student. Lastly, the address for the Adela Biderman int he search result matched the school address of the Adela Biderman who signed the Album.
Adela Biderman also had a record of a transport number and date, but that date did not match any of the date of deportation on the seocndary source records. However, her deportation date falls between two of the recorded deportations to Chelmno, so it is possible to deduce that she may have perished in the gas vans to Chelmno. More information is under "The Ghetto" tab.
Adela Biderman's transport number was 39, and her transport date was April 4, 1942. According to the timeline of deportations and transports, there were 2 deportations near her date. One was from April 1-2, and the prisoners were deported to Chelmno and all perished in the gas vans. The other transport near her date was on May 4-15, which also went to Chelmno where all the prisoners died in the gas vans. Her fate is unknown at the moment and it is uncertain whether the date of her transport was accurate to the records shown. Is it plausible to assume that she may have perished in the gas vans to Chelmno?
After looking through the secondary sources records, we've concluded that Adela probably perished in the gas vans that were traveling to Chelmno on the two dates near her own deportation (April 24, 1942), which were April 1-2 and May 4-15.