Why do I yawn?

Simple text and photographs describe the theories about why people yawn.

Capstone Press, a Capstone imprint
2015
9781491421079
book
Lexile: 
650
Non-Conforming

Holdings

hidmidmiidnidwidlocation_codelocationbarcodecallnumdeweycreatedupdated
95001946695702335449074623482RHLE405RHLE030364E 612.2 KOL612.215802161721736518457
104074147344582361449074623482VEC5724VEC0034835612.2 Kol612.215802161721736800991
109988947885762298449074623482EIHR161EIHR032151612.2 Kol612.215802161721736518457
126014449348632313449074623482HFLP268HFLP006237612 KOL61215814652241736518457
145430550901132340449074623482WEDW485WEDW200482612.2 KOL612.215814652241736518457
150775251395262344449074623482WEPN488WEPN900893612.2 KOL612.215814652241736518457
173884753457992432449074623482BPGT117BPGT056223612.2 KOL612.215825759371742569409
179304353966642436449074623482CCES136CCES304797612.2 KOL612.215825759371742569409
286750563479462393449074623482MAE295MAE0024951E 612.2 KOL612.216377825731736800991