?
3
Bulletin of the Pan American Union. Vol. LXVIII. [January-J..
United States congressional serial set ; serial set no. 9869;House document / 73rd Congress, 2nd session. House ; no. 155, pt. 1, 2, 3, 4, 5 & 6
?
4
Bulletin of the Pan American Union. Vol. LXXXI. [January-Ju..
United States congressional serial set ; serial set no. 11192;House document / 80th Congress, 1st session. House ; no. 21, pt. 7, 8, 9, 10, 11 & 12
?
5
Bulletin of the Pan American Union. Volume LXXIII. [July-De..
United States congressional serial set ; serial set no. 10389;House document / 76th Congress, 1st session. House ; no. 55, pt. 7, 8, 9, 10, 11 & 12
?
6
Bulletin of the Pan American Union. Vol. LXVI. [January-Jun..
United States congressional serial set ; serial set no. 9629;House document / 72nd Congress, 1st session. House ; no. 63, pt. 1, 2, 3, 4, 5 & 6