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astringency and hemostasis betaretrovirus (mammalian type b & type d retrovir binomial model calcinaphthol chemical feeding Chittur chromatic phytosis DGTG dipak flow calorimetry genus Paramecium geographic coordinate net Hagg carbide Ilchubog Klemensker petticoad insulator pure mutual scheme recentering calibration system reliability and maintainability assurance traffic working volume