The letters are Roman numerals that stand for the number (hence the copyright year) 1950.
The conventional conversion of the Roman numerals MCML into Arabic numerals is 1950.
If you mean the Roman numeral of MCML then nowadays it is considered to be the equivalent of the Arabic number 1950
2010.
MCML = 1950
It can mean that either the book was published in 1905 or that the original story was copyrighted in 1905 and published at a later date.
MCML = 1950MCMI = 1901
In todays modern notation of Roman numerals mcmlxxxiv represents 1984
No. The International Standard Book Number is a 10- or 13-digit commercial identifier. The copyright date is a 4-digit year.
A set of letters or numbers on the copyright page generally refers to the number of the printing or edition of the book.
They indicate what printing the book is on.
MCML
1950