De Locomotief, 29 Mar 1952: a Blue Band margarine advertisement listing prize-competition winners. It was retrieved only because of the name Sumijarsi/M. Caropeboka (Bogor) in the winners' list; no Gerwani-related content. False hit, much OCR unreadable.
Newspaper advertisement page (1 Apr 1952) in De Vrije Pers listing prize winners of a consumer contest (Fiat 500, bicycles, radios and others) with long lists of names. No Gerwis/Gerwani content; an archive tag linking it to Sumiyarsi Siwirini Caropeboka rests only on a surname fragment in the list.
Het Nieuwsblad voor Sumatra page-4 advertisement (1 Apr 1952): a long Blue Band/Unilever prize-draw winners list (cars, scooters, radios, etc.) with hundreds of names and towns. 'M. Caropeboka - Bogor' appears as a ballpoint winner. Nothing indicates any link to Sumiyarsi Siwirini Caropeboka; the name match is coincide
De Locomotief, 18 Nov 1952: Indonesian-language thank-you notice by the Milono family and by newlyweds Mulyono and Sutanti after their wedding on 13 Nov 1952, plus a subscription form. No connection to Gerwani; the bride Sutanti is not shown to be Soetanti Aidit. False hit.