$4.80

Beatriz E. Henao Zapata, Richmond

$6.00

$14.00

Carmen Navarro, Richmond

$19.00

$19.50

Paul a Davies, Macmillan

$4.80

C. Lethaby - S. Brewster, Richmond

$15.00

Jeanette Greenwell, Mcgraw Hill

$5.00

Maria Latorraca, Richmond

$12.00

$6.00

Paul a Davies, Macmillan

$4.80

$14.00

Nick Beare, Macmillan

$4.80

$15.00

$28.60