Angulo C., Enrique (1952, 1 letter) Anning, J.R. (1951, 1 letter) Arata, Father D. (1953, 2 letters) Aravena, Pablo (1955, 1 letter) Arbelaez, Enrique Perez (1950, 5 letters) Archer, Dr. W. Andrew (1950–1956, 10 letters) Arens, Dr. P.L. (1956, 2 letters) Arents, George (1948, 11 letters) Armstrong, Joseph R. (1955, 1 letter) Armstrong, N. W. (1940, 1 letter) Arnold, Samuel T. (1955, 2 letters) Aronoff, S. (1954, 2 letters) Artayeta, Dr. Enrique Amadeo (1944, 3 letters) Aspiazu, Dr. Rufino (1952–1957, 4 letters) Asplund, Dr. Eric (1949–1956, 7 letters) Astorga Cartes, Mario (1956, 4 letters) Avery, George S. Jr. (1950, 1 letter) d'Azy, Charles Benoist (1949, 2 letters) Babcock, E.B. (1951–1954, 5 letters) Bache-Wiig, Dr. Sara (1956, 1 letter) Bachrach, Jean (1951, 2 letters) Bagges, J.W. Esq. (1956, 2 letters) Bailey, Alfred M. (1959, 1 letter) Bailey, Dr. Ethel Z. (1949–1956, 6 letters) Bailey, Gordon (1948, 2 letters) Bailey, Dr. L.W. (1949, 1 letter) Baitsell, Dr. George A. (1951, 1 letter) Baker, F.S. (1950, 1 letter) Baker, J.B. Jr. (1955, 1 letter) Baker, L.G. (1946, 1 letter) Baker, R.E.D. (1949, 4 letters) Baker, R.R. (1954, 2 letters) Baldwin, Neil (1954, 2 letters) Balfour, A.P. (1950–1951, 5 letters) Ballard, Carl M. (1956, 2 letters) Balls, Edward K. (1954, 3 letters) Baluch, Manzour Ahmed A. (1957, 3 letters) Bardin, Pablo (1949, 2 letters)