In the article Womcodes constructed with projective geometries Frans Merkx constructed several good wom-codes (write-once memory codes, see How to reuse a "write-once" memory by Rivest & Shamir for classical introduction). But the code $\left< 15\right>^7/15$ (which allows to write 7 times a number from 1 to 15 in 15 write-once bit positions (wits)) was described without any technical details. The author refers to his report F. Merkx, Codes for Write-Once Memories, Rapport Interne, Ecole Nationale Superieure des Telecommunications, Paris, 1984 which is not available online.
Are there any books or articles containing detailed description of the code $\left< 15\right>^7/15$?
This is the link to French library containing Merxk's report but unfortunately it is out of reach for me.
