Twenty-six afternoons of biology :
Wald, George.
Twenty-six afternoons of biology : an introductory laboratory manual / [by] George Wald [and others]. - 2nd ed. - Reading, MA : Addison-Wesley, [1966] - Addison-Wesley series in biology .
Biology -- Laboratory manuals.
Twenty-six afternoons of biology : an introductory laboratory manual / [by] George Wald [and others]. - 2nd ed. - Reading, MA : Addison-Wesley, [1966] - Addison-Wesley series in biology .
Biology -- Laboratory manuals.