-
"Trading under the Laws of Germany", Dr. Ernst Stiefel, New York: Bd. 7
ohne Datum [1949-1959], Bundesarchiv, BArch B 140/369 -
"Trading under the Laws of Germany", Dr. Ernst Stiefel, New York: Bd. 2
ohne Datum [1949-1959], Bundesarchiv, BArch B 140/128 -
"Trading under the Laws of Germany", Dr. Ernst Stiefel, New York: Bd. 8
1953-1954, Bundesarchiv, BArch B 140/81 -
"Trading under the Laws of Germany", Dr. Ernst Stiefel, New York: Bd. 4
ohne Datum [1949-1959], Bundesarchiv, BArch B 140/326 -
"Trading under the Laws of Germany", Dr. Ernst Stiefel, New York: Bd. 5
1956, Bundesarchiv, BArch B 140/118 -
"Trading under the Laws of Germany", Dr. Ernst Stiefel, New York: Bd. 1
1952-1957, Bundesarchiv, BArch B 140/79 -
"Trading under the Laws of Germany", Dr. Ernst Stiefel, New York: Bd. 3
ohne Datum [1949-1959], Bundesarchiv, BArch B 140/323 -
"Trading under the Laws of Germany", Dr. Ernst Stiefel, New York: Bd. 6
ohne Datum [1949-1959], Bundesarchiv, BArch B 140/324