1. A nimal and P lant H ealth I nspection S ervice 2000 Foreign Plant Quarantine Notices. Subpart-Nursery stock, plants, roots, bulbs, seeds, and other plant products. Title 7 - Agriculture. Chapter III. Part 319 U.S. Department of Agriculture, Animal and Plant Health Inspection Service
2. Research on the biology of flowering and fruiting of blackcurrants;Baldini;Riv. Ortoflorofruttic. Ital.,1961
3. Currants, Gooseberries, and Jostaberries