One tool that helped many get started in the ministry was the testimony card, which Kingdom publishers began using in 1933.
كَانَتِ ٱلْبِطَاقَةُ بِحَجْمِ ٱلْكَفِّ ،‏ وَتَضَمَّنَتْ رِسَالَةً مُخْتَصَرَةً مِنَ ٱلْكِتَابِ ٱلْمُقَدَّسِ .‏