Look up the work of Mark Tauger. He is an economic historian who specializes in the period.
He describes the worst human-driven cause of the famine being the mass slaughter of livestock, cattle but also very importantly mass slaughter of horses used for meat and labor, by kulaks and Ukrainian nationalists.
He also describes the relief efforts made by the Soviets, especially once the higher leadership in Moscow began taking a more active role as the crisis deepened.
6 points
A lot of his essays have been collected here
He’s an academic so you also find a lot of his work on libgen especially if you search journals.
https://historynewsnetwork.org/article/169438
I can also toss in more citations later in the day too if requested
