00426nam a22001577a 4500003000400000008004100004082001400045100001700059245007200076260004100148300001000189650001800199650001800217650001200235700002100247OSt231010b        |||||||| |||| 00| 0 eng d  a574bP41P  aPerry, G. A.  aProgressive Biology : book 2 / cby G. A. Perry and M. J. D. Hirons  a.- Londonb: Blandford Pressc, 1968  a176p.  aPure Sciences  aLife Sciences  aBiology  aHirons, M. J. D.