FoPP 028 1.II.20 Weak Left Hand; Using One Hand to Teach the Other
Fundamentals of Piano Practice - A podcast by Chuang C. Chang / Henrik Pantle

Students who do not practice HS will always have a stronger RH than LH. This happens because the RH passages are generally more difficult, technically ... http://www.pianofundamentals.com/book/en/1.II.20