[James A Pratt III]

BCRS Vol 5 page 262 photo "The area around Ponyri was littered with destroyed Ferdinands The Soviets counted forty-five" looking at wiki on the Elefant panzer the Germans lost 39 Ferdinands/Elefants in the Kursk period July-2 Aug 43. It looks like 23 were lost at Ponyri along with a number of other AFVs. Note: according to David Glantz the Russians often refered to German half tracks as tanks.

for the books on the Ferdinands see
The Combat History of Schwere Panzer Jager Abtielung 653
The Combat History of Schwere Panzer Jager Abtielung 654 both by Karl Heinz Munch