000009448 001__ 9448 000009448 005__ 20220628160534.0 000009448 037__ $$aGENERAL 000009448 245__ $$aThe Type 21 Frigate 000009448 269__ $$a1970 000009448 520__ $$aThe Type 21 Frigate. June 1970. S. M. ADAMSON, B.Sc., C.ENG., M.I.MECH.E., A.M.I.MAR.E. 000009448 773__ $$tJournal of Naval Engineering$$j19$$k1 000009448 8564_ $$96ea3eb58-ef24-41d5-a312-db0d4523bf27$$s1132368$$uhttps://library.imarest.org/record/9448/files/v19b1p01a.pdf