Held ball?

[turnit]

Worked a travel girls game last night with a more senior official. I made a call I need help with. Offensive player goes up for a shot in the lane, defenxive player puts hand on top of the ball, no foul. Offensive player comes down still with the ball and defensive player still has hand on top. I called a held ball, alternating possession.

After the game, my partner says he would have called an "up and down", which I thought was called a travel, but I digress. He asked if you could have possession with only one hand on the ball by the defender when the offensive player had two hands. I said that a dribbler had possession with only one hand, so it is possible. I was just wondering if anyone could tell me where to find this in the rule book so I can either tell him I was wrong, or let him know where to find it himself.

Thanks