Handbook of chemistry and physics : a ready-reference book of chemical and physical data / editor in chief, Charles D. Hodgman,... ; associate editor in charge of chemistry, Robert C. Weast,... ; associate editor in charge of physics, Robert S. Sankland,... ; associate editor in charge of mathematics, Samuel M. Selby,... ; in collaboration with a large number of professional chemists and physicists whose assistance is acknowledged in the list of general collaborators and in connection with the particular tables or sections involved