The best answer is: The reader could make a connection between the quote by one ILGWU official and the reference to “these girls” in the same quote.
This connection helps the reader understand that the ILGWU (International Ladies' Garment Workers' Union) consisted largely of female workers, as indicated by the reference to "these girls" in the context of the enduring efforts of the picketers. This highlights the resilience and dedication of female workers within the union, emphasizing their unique contributions and experiences in the garment industry.