H.P. and Hoff Riley books & textbook
Chromosome Breakage in Tulbaghia Violacea by Radiation and Chemicals
The Nucleus, Vol. 3, No. 1, pp. 1-18 / Paperback
Chromosome Studies in some South African Dicotyledons
Canadian Journal of Genetics and Cytology, Vol. 3, No. 1, September, pp. 260-271 / Paperback
