1. The rapid quantitative assay and colour test for penicillin by specific binding to cell wall enzyme;Charm;Journal of Dairy Science,1980
2. The infra red milk analyser;Goulden;Journal of the Society of Dairy Technology,1964
3. Preservation of milk samples for bacteriologic and cytologic examinations and examinations for inhibitors;Heeschen;Milchwissenschaft,1969
4. Preservation of milk samples for bacteriological and cytological examination and detection of inhibitors;Heeschen;XVII International Dairy Congress,1970