This is the third of a series of four papers, the goal of which is to identify the overcontact eclipsing binary star systems for which a solid case can be made for mass exchange. To reach this goal, it is necessary first to identify those systems for which there is a strong case for period change. We have identified 60 candidate systems; in the first two papers (Nelson et al., 2014, Nelson et al., 2016) we discussed 40 individual cases; this paper continues with the last 20. For each system, we present a detailed discussion and evaluation concerning the observational and interpretive material presented in the literature. At least one eclipse timing (ET) diagram, commonly referred to as an “O–C diagram”, that includes the latest available data, accompanies each discussion. In paper 4, we will discuss the mechanisms that can cause period change and which of the 60 systems can be reliably concluded to exhibit mass exchange; we will also provide a list of marginal and rejected cases – suitable for future work.

这是四篇论文系列文章中的第三篇，其目的是确定可以为质量交换提供坚固外壳的超接触日蚀双星系统。为了达到这个目标，首先必须确定那些有很强的周期变化理由的系统。我们已经确定了60个候选系统；在前两篇论文（Nelson等，2014； Nelson等，2016）中，我们讨论了40个个案。本文继续到最后20个。对于每个系统，我们都会对文献中介绍的观察性和解释性材料进行详细的讨论和评估。每次讨论都至少包含一个月食时序（ET）图，通常称为“ OC图”，其中包括最新的可用数据。在论文4中，我们将讨论可能导致周期变化的机制，以及可以可靠地推断出60个系统中的哪个可以表现出质量交换；我们还将提供一些边缘案例和被拒绝案例的列表，以适合将来的工作。