4 early Piano Sonatas by Scriabin???

[tinctoria88]

While reading notes of a recording, I noticed mention of FOUR "early attempts" at the sonata form that Scriabin produced.  Two of these are op. posth. sonatas that I'm aware of:  Sonata-famtasie in G-sharp minor and the Sonata in E-flat minor WoO 16.  Both of these are available through IMSLP Petrucci music library online.
Does anyone know of the other 2 early "op. posth." sonatas by Scriabin?  And possibly where one could acquire a printed copy of the music?
Thanks for any info or suggestion how I might hunt for these works.

[visitor]

I am pretty sure if they exist that they are in this book i have in score somewhere in my music room, I recall it was a spiral bound book, looked like a small time publisher, had tons of cool hard to find u common pieces including revisions Or pre revision versions if stuff and awesome fragments, it had th unfinished Scriabin Ballade in there too, cannot revel name but I should be able to dif it out and update this reply.

If they are not in that volume,  I ha e no idea, thay books contains exceptionally amd exceedingly rare pieces,  it's an important volume

[visitor]

See my post fom late March 2016 here
https://www.pianostreet.com/smf/index.php?topic=61156.0

Good stuff in that thread....vtw here us the excerpted post I out up in question

published about 20 years ago
Scriabin, Aleksandr Nikolayevich, and Daniel Bosshard. Jugendwerke für Klavier. Ardez [Switzerland]: Ediziun Trais Giats, 1997.

current item copy is found: Composed by Alexander Skrjabin (1872-1915). Edited by Bosshard, Daniel. Published by Thomi-Berg (TH.ETG-106).

can be purchased here
https://www.sheetmusicplus.com/title/jugendwerke-fur-klavier-sheet-music/8128239

contains
Vollendete Kompositionen. Scherzo Es-Dur, WoO 4 ; Scherzo As-Dur, WoO 5 ; Fuge f-Moll, WoO 12 ; Fuge f-Moll, WoO 13 ; Klavierstück b-Moll, Anh. 16 ; Mazurka h-Moll, WoO 14 ; Duett für 2 Singstimmen d-Moll, WoO 10 ; Poème symphonique für 2 Klaviere d-Moll, WoO 24 -- Anhang, Fragmente. Etude Des-Dur, Anh. 8 ; Etude Fis-Dur, Anh. 9 ; Sonate cis-Moll, Anh. 11 ; Valse-impromptu Es-Dur, Anh. 13 ; Ballade b-Moll, Anh. 14.

There's a bunch of music in there I don't think that's a complete list