c. 1949

The 18 Delta Crochet patterns are accredited to Linda and Herbert Niebling as the designers.

The title translates as:
“Mallin Handarbeitslehrbücher” - “Mallin Hand Textbooks No. 402”
”Rundhäkeln“ - “ Round Crochet”

Pamphlet published in 1949 by Helene Mallin Verlag