Definitions/Hca-hpa
From scientopedia
Hca/hpa
Definitions → H → Hca/hpa
[At one time HCA and HPA were equivalent certificates, HCA being the American designation and HPA, the British. Data on this appears in HCOTB 12 Sept 56 and HCO PL 1 Oct
58. The current usages of each of these designations are listed separately under each.]
