Hi all, I found the article in Model.Shipwright. I am afraid it is a while back, Dec. 1977. Boat by name is Hippolyte Bloch, another name to check out is Pierre Brouse.
Both are Rhine pusher tugs. Article written by James Pottinger, who I think is on another thread and interested in any working models made to his plans. So he may be able to help.
regards Roy