Volume 90, Issue 3, November 1969

Hilbert manifolds

Pages 379-417 by Dan Burghelea, Nicolaas H. Kuiper

Weakly complex involutions and cobordism of projective spaces

Pages 418-432 by Charles H. Giffen

Determination of the differentiably simple rings with a minimal ideal

Pages 433-459 by Richard E. Block

On the periods of certain rational integrals. I.

Pages 460-495 by Philip A. Griffiths

On the periods of certain rational integrals. II.

Pages 496-541 by Phillip A. Griffiths

Hurwitz schemes and irreducibility of moduli of algebraic curves

Pages 542-575 by William Fulton

On cohomology of kleinian groups. II.

Pages 576-590 by Irwin Kra