00481nam a2200169Ia 4500003000400000005001700004008004100021022001500062040001000077050002200087110004700109245003000156260005300186300001500239490002700254650003000281OSt20260813092703.0251229s9999    xx            000 0 und d  a11240883-4  cEULIB  aQL 759 b.B7 1972  aMinistry of Agriculture Fisheries and Food 0aAvian Embryo Development.  aLondon :bHer Majesty's Stationery Office,c1972  aviii, 24p.  aTechnical Bulletin 23;  aEmbryo Development--Avian