A.,
I hear lots of frustration in your email; I also hear the disciplinarian.
Breathe. Breathe. Breathe.
Realize that lots of women have been where you are, and only a few of them have actually stuffed their husbands in dumpsters!!! :) Also that very few of their daughters who were let cry (or who were indulged at 13 months) turned out to be axe-wielding serial killers. :)
First, a few reality checks:
1. Your daughter has been sleeping in her own crib since birth--Wow! Ahead of the curve; give thanks and praise!
2. Your daughter only wakes up once in the night--Wow! Again, ahead of the curve; give more thanks and praise!
3. Sleeping straight through an entire night is not only pretty much NOT the norm, but also over-rated. Between stress, menopause, and waking when the man in my life gets up to pee, I probably haven't slept straight through a whole night in about ten years, so, again, you're ahead of the curve here, chick! :) But I figure that every time I wake up, it gives me a chance to roll over and snuggle my guy, or look in on my sleeping daughter (now 12), or go through my list of things to be grateful for: good job, warm home, loving family, enough to eat...)
(what I'm suggesting here is to adopt a "glass-half-full" kinda attitude for awhile. Not easy for us frustrated disciplinarians, but it gets easier!)
OK, now to your half-empty part of the glass:
Julia is only 13 months old. At this age, the world is still pretty much new to her; she doesn't have many memories to fill in blank spaces. Something wakes her in the middle of the night and she finds herself alone and terrified; she wants reassurance, she cries out. She still really needs to know that you're there. At this age, it's still appropriate to come in, soothe her and reassure her for a few minutes, give her the tossed lovey, then leave. (Are you doing the thing where you gradually increase the amount of time between going in and decrease the amount of time you spend soothing?)
At 13 months, she doesn't do logic and reasoning, just feels your touch, smells your reassurring presence, hears your voice. Go in, not with the idea that she's driving you nuts, but that you have a little time with her in the middle of the night (I know, doesn't feel like it at this point, but now that my daughter's 12, I sooo long for that time; I have to sneak in while she's asleep to stroke her hair and kiss her forehead. And sing to her? Forget it; she won't allow that!)
You won't undermine discipline if you get up to soothe her, retrieve a stuffed toy, stroke her back--and it'll soothe you, too. (relaxing her will relax you; I teach dance @ college and sometimes do relaxation with my classes; I'm so relaxed after I talk them through a relaxation that I'm almost in a Zen Zone).
This will also reduce your husband's frustration, too.
You might try a pre-emptive strike: Sleep in her room once or twice so that the MOMENT she wakes, you soothe her by stroking her back; she'll return to sleep more quickly and maybe, just maybe, after a few nights she'll be able to put herself back to sleep.
Best of luck.