title: Genetics of Natural Populations. VIII. Concealed Variability in the Second and the Fourth Chromosomes of Drosophila Pseudoobscura and Its Bearing on the Problem of Heterosis.
authors.affiliation: Columbia University, New York.
authors.forename: T
authors.initials: T
authors.lastname: Dobzhansky
authors.forename: A M
authors.initials: AM
authors.lastname: Holz
authors.forename: B
authors.initials: B
authors.lastname: Spassky