From Näh-Connection:
Miss Marlene is a classic shirt, with an eye-catching addition. Shoulder corners are inserted into the long straight neckline, which provide space to play with colours and patterns. The design also offers three different sleeve lengths, so Miss Marlene will join you all year round! The comprehensively illustrated sewing instructions leave no question unanswered! Step by step to the finished article.
Seems to be available in English at Näh-Connection as a PDF, and at the Fritzi and schnittreif shops in German in both PDF + Paper forms.