Place of publication:
Diez Anos Servic. Bot. Univ. Cuzco 46. 1946; Las papas sudperuanas, Univ. Nac. Cuzco 2:58. 1956
Comment:
the Peruvian National Library copy of this work was acquired on 29 December 1956 (fide B. León, pers. comm. via e-mail on 1 May 2009)