The Pictorial Encyclopaedia of Scientific Knowledge /
New York, Encyclopaedia Britamica Inc.
The Pictorial Encyclopaedia of Scientific Knowledge / - London : Sampson Law Marston & Co, , 1950 - 239p :
Dictonery
The Pictorial Encyclopaedia of Scientific Knowledge / - London : Sampson Law Marston & Co, , 1950 - 239p :
Dictonery