Demography Through Problems (Problem Books in Mathematics), Keyfitz, Nathan,Beek

Demography Through Problems (Problem Books in Mathematics),Keyfi

Problem-Solving Through Problems (Problem Books in Mathematics) by Larson

Problem Books in Mathematics Ser.: Demography Through Problems by John A....

Probability Through Problems (Problem Books in Mathematics)

Problems in Mathematical Analysis by B.P. Demidovich (1977 Rare Soviet Edition)

Problem-Solving Through Problems (Problem Books in Mathematics) by