Using both hands and feet

🧠Theory and Research
1

http://yxjyts.cnjournals.com/yxjyts/ch/reader/create_pdf.aspx?file_no=202007020&flag=1&journal_id=yxjyts&year_id=2020

http://yxjyts.alljournals.ac.cn/yxjyts/ch/reader/create_pdf.aspx?file_no=201801114&st=alljournals