Nr 234 - VII World Congress on Fertility and Sterility. 1971. ; Nr 235 - VIII Europen Congress of Allergology 1971. ; Nr 236 - Second International Symposium on growth hormone. 1971
Treść karty:
516,908 Nr 234 - VII World Congress on Fertility and Sterility. 1971. 516,911 Nr 235 - VIII Europen Congress of Allergology 1971. 602,017 Nr 236 - Second International Symposium on growth hormone. 1971