Skill level = Advanced

Some written instructions along with a well-defined chart.

Pattern is 17 on page 42 in Magic Crochet.
Pattern 4, Campanula, in Haekling/Crochet Creations (where it is made in the larger thread).
Pattern 1, Lopp-the-Loop, in Crochet Monthly, #139.

In other sources name of doily is Oleandr.