books interest and effort in education
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# time and effort
# Effort
# humble effort
# Submitted effort
# scientific effort
# physical effort
# international effort
# Effort and diligence
# justify the effort
# make the best effort
# How do I succeed with minimal effort?
# Effort at work
# Teaching the child to participate and care
# Fundamental effort at the mark of ornaments
# classified by effort
# attraction and effort
# Field and potential physics
# Interest in science - scientists and education
# Make an effort to indicate the time of tahajjud
# Theories of attraction and effort
