books وفرة نظائرية نسبية
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# partial isotopic abundance
# relative abundance
# isotope abundance
# Isotope abundance ratio
# isotope abundance ratio
# natural abundance
# abundance of chemical elements
# The reason for the abundance of hydrogen
# Species abundance distribution
# abundance of elementary elements
# Factors of abundance and diversity of production
# economy of abundance
# abundance doctrine
# A question of abundance varieties
# Rana messenger abundance rate
# abundance curve
# Stochastic Abundance Models
# abundance of things
# abundance of blood
# Data abundance
