Childs, W H J .
Physical constants / Textual Documents W H J Childs. - 1 / . - London : John Wiley & Sons , 1960. - 79 ; .
530.81 / CHI/PH
Physical constants / Textual Documents W H J Childs. - 1 / . - London : John Wiley & Sons , 1960. - 79 ; .
530.81 / CHI/PH