I expect when you refer to the "Anti-personnel Weapons" book you are talking about the one done by SIPRI? It is one of the more accurate, though it suffers from a couple of flaws, it was done by researchers who only saw data, no actual weapons experience, and there are no photos to aid with identification.
My reference to the Lance is about the golfballs, M32, M38 and the M40. We used to refer to the sizes of the spherical submunitions as golfballs, baseballs and softballs.
Pete, the HJ warhead is still in the basement, I'll move it and the dispensers when they finish the last bits inside (furnace/plumbing). Till then they just take up too much room - even in the Bombatorium.