Orkhon alphabet/Labials

Potential sources

Aramaic

/p/	/b/	/w/	/m/
Error creating thumbnail:	Error creating thumbnail:	File:Waw.svg	File:Mem.svg

Latin

/p/	/b/	/f/	/v/	/m/
P	B	F	V	M

Greek

/p/		/b/		/pʰ/		/ps/		/m/
Π	π	Β	β	Φ	φ	Ψ	ψ	Μ	μ

Brahmi

b	bʰ	p	pʰ	v	m
File:Brahmi b.svg	File:Brahmi bh.svg	File:Brahmi p.svg	File:Brahmi ph.svg	File:Brahmi v.svg	File:Brahmi m.svg

Kharosthi

b	bʰ	p	pʰ	v	m
File:Kharosthi b.svg	File:Kharosthi bh.svg	File:Kharosthi p.svg	File:Kharosthi ph.svg	File:Kharosthi v.svg	File:Kharosthi m.svg