nested stl map question

I have an stl map container declared as:
    typedef std::map< int, float > THETA_RESULTS;
    typedef std::map< int, THETA_RESULTS > RESULTS;
    RESULTS m_results;

I populate it kind of like this (where phi and theta are angles
measured in degrees):
    for( int phi = 0; phi <= 180; phi += 30 )
    {
        for( int theta = 0; theta <= 360; theta += 30 )
        {
            m_ThetaResults[ phi ][ theta ] = some_value;
        }
    }

I would like to print the results like this, but I'm not quite sure
how:
<angles> Phi0, Phi1, Phi2, Phi3, Phi4, Phi5, ...
 Theta0, val00, val10, val20, val30, val40, val50,...
 Theta1, val01, val11, val21, val31, val41, val51,...
 Theta2, val02, val12, val22, val32, val42, val52,...
 ...

I'm trying to do something like this, but this, obviously, doesn't
work:

    RESULTS::const_iterator phi = obj.m_results->begin();
    THETA_RESULTS::const_iterator theta = (*phi).second.begin();
    for( ; theta != (*phi).second.end(); ++theta )
    {
        cout << (*theta).first << ",";
        for( ; phi != obj.m_results->end(); ++phi )
        {
            cout << ( *theta ).second << ",";
        }
        cout << std::endl;
        phi = obj.m_results->begin();
    }

I would appreciate any help. Thanks,
PaulH