Travels of Ruiz, Pavón, and Dombey in Peru and Chile (1777-1788) / by Hipólito Ruiz ; with an epilogue and official documents added by Agustín Jesús Barreiro ; translation by B.E. Dahlgren.

v.21(1940)

Peruvian snakes from the University of Arequipa, by Karl P. Schmidt and Warren F. Walker.

v.24:no.26(1943)