This pattern is featured in a beautiful hard cover book.
It is an illustrated story of a girl that finds a tiny Mermaid inside a shell. There are included knitting and sewing patterns to make the Mermaid Doll.
The doll can be made with worsted for the 18” doll or sport for the 15” version. Knit in the round with minimal sewing.
The book is available here.
You can read about the doll and my efforts to publish on my blog