From a bygone era.
Vinyl technology moved from mono to stereo and then there was Quadraphonic audio with 4 channels, a precursor to modern surround sound systems.
There were a number of quadraphonic systems developed and although not clearly stated on this record, I believe this to be a Stereo-4 system recording.
Stereo-4, also known as EV (from Electro-Voice) or EV-4, was a matrix 4-channel quadraphonic sound system developed in 1970 by Leonard Feldman and Jon Fixler.

For those who are interested in the development of quadraphonic recording technology, below is a link to an excellent technical site giving details of the various systems

https://midimagic.sgc-hosting.com/quadrafon.htm
Quad encoded vinyl record containing a compilation of American artists
Quadraphonic Sampler CompilationInterfusion RecordsCat# SITFL-9344601972Cover is in good conditionIncludes a new inner plastic sleeveVinyl is in excellent conditionNew outer protective sleeveArtist – SongBobby Byrne – A Shade Of Brass, Help Yourself, RespectGloria Loring – Leaving On A Jet Plane, Everybody’s Talkin;The Electric Hair – Aquarius, Be In (Hare Krishna)Todays People – You’ve Made Me So Very Happy, What The World Needs Now Is LoveLighthouse – Hats Off To The Stranger