American | American Civil War | American Broadcasting Company | American football | African American | American Idol | American Revolutionary War | American Revolution | Society of Jesus | Royal Society | American Association for the Advancement of Science | American Red Cross | National Geographic Society | American Library Association | American Museum of Natural History | American Express | American Academy of Arts and Sciences | American League | American Association | American Heart Association | American comic book | American Institute of Architects | American Airlines | American Hockey League | Spanish-American War | Pan American Games | American Cancer Society | Whitney Museum of American Art | American Ballet Theatre | American Legion |
He was honorary member of the American Society of Mammalogists (ASM), Cooper Ornithological Society (COS), Sociedad Argentina para el Estudio de los Mamíferos (SAREM) and the Comité Argentino de Conservación de la Naturaleza.
He was a member of Sigma Xi, Phi Kappa Phi, and Phi Zeta; a Fellow of the American Association for the Advancement of Science, a member of the American Association of Anatomists, the American Society of Mammalogists, the Histochemical Society, the Society for the Study of Reproduction, and the American Society of Zoologists.