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
95001946695702193449074623482RHLE405RHLE030364E 612.2 KOL612.215802161721708963493
104074147344582147449074623482VEC5724VEC0034835612.2 Kol612.215802161721695044385
109988947885762156449074623482EIHR161EIHR032151612.2 Kol612.215802161721708963493
126014449348632171449074623482HFLP268HFLP006237612 KOL61215814652241708963493
145430550901132198449074623482WEDW485WEDW200482612.2 KOL612.215814652241708963493
150775251395262202449074623482WEPN488WEPN900893612.2 KOL612.215814652241708963493
173884753457991773449074623482Ginther117BPGT056223612.2 KOL612.215825759371662467957
179304353966641777449074623482CCES136CCES304797ENF 612.2 KOL612.215825759371662467957
286750563479462103449074623482MAE295MAE0024951E 612.2 KOL612.216377825731695044385