The following sites I found have universal algebra worksheets
for you to have a look at . Here are the sites I hope they can help
you www.homeschoolmath.net/online/algebra.php/ , and
www.homeschoolmath.net/worksheets/
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Arthur Knoebel has written:
'The equational classes generated by single functionally
precomplete algebras' -- subject(s): Lattice theory, Universal
Algebra, Varieties (Universal algebra)
'Sheaves of Shells over Boolean Spaces' -- subject(s): Sheaf
theory, Boolean Algebra