@article{ref1,
title="Comparison of time-sampling and continuous-recording techniques for observing developmental changes in caretaker and infant behaviors",
journal="Journal of genetic psychology",
year="1973",
author="McDowell, E. E.",
volume="123",
number="1st Half",
pages="99-105",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-1325",
doi="",
url="http://dx.doi.org/"
}