Multiple microphones input to one audio input jack? Splitter?

I have a nikon D3200. Its a nice and easy to use camera but I'm not a huge fan of the tools and such that can be used with it. I like the idea of having an audio input on the camera but I am not sure what its limits are. So, I want to have 2 microphones plugged in and both recording what I am filming (More depth to the sound and more options as to what I can record) I want to conduct interviews with this camera. I have two handheld Audio Technica microphones that have a 3.5mm jack that plug into my camera. I would really prefer to be able to use both at the same time and have both plugged into the cameras single audio input jack. How would i go about doing this? Use a splitter and just plug the mics into the ports or what? I don't have many options as to what I can buy. I will be in another country (specifically Haiti) and electricity and all that isn't an option. Thanks!

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