Tyrell #4 Question

[muschem]

As a returning player, I've been revisiting all the books I was familiar with 20 years ago (some of the newer editions are very nice), but also exploring those that I missed back then. Somehow, Tyrell's 40 Progressive Studies never made it onto my stand in high school or college, but I saw mention of it here and recently picked up a copy. I enjoy the content so far, but I ran across what seems like a misprint in study #4 (I'm using the Boosey & Hawkes version - I'd check a different edition, but I didn't see one in print): measure 38 appears to have a quarter-note triplet followed by an eighth note triplet (represented as one quarter note + one eighth note). The measure seems to be missing a quarter note worth of duration (2/2 time). I assume this is a well known issue, so I wanted to ask the experts - what is the correct solution?

The triplets aren't bracketed in this printing, so it is conceivable that the first three quarter notes are actually misrepresented as a triplet set. Eliminating that first triplet and playing three regular quarter notes instead, followed by an eighth note triplet resolves the missing beat. Or, perhaps there is a missing quarter rest in the measure? It doesn't seem likely that there is an unmarked time change for that one measure, but I suppose that is also possible. It isn't a performance piece, so it isn't super critical to resolve... just one of those curiosities. Thanks in advance for sharing your thoughts and experience.

[Burgerbob]

I think it's just written half value of what it should be. Half note and quarter note under a triplet heading is what I play.

[muschem]

That makes sense. Thanks!