00465nam a2200169Ia 4500 190327s9999||||xx |||||||||||||| ||und|| 57-7142 NITIL NITIL 21st 540.3 C593E Clark, George L (Ed.) The Encyclopaedia of Chemistry George L Clark New York Reinhold 1957 xvi, 1037p. Chemistry-Encyclopaedia Hawley, Geener G (Ed.) BKS 59219 59219