The emitters of transistors Q5 and {TAIL ~ Q6} are coupled to the emitter series feedback resistors R1 and {HEAD ~ R2}, respectively 
The emitters of transistors Q5 and { TAIL ~ Q6 } are coupled to the emitter series feedback resistors R1 and { HEAD ~ R2 } , respectively
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH