CombS                   The Combinatory Method (s) for the construction
                        of rectangular PBIB designs
GPBIB4A                 Generalized rectangular right angular (4)
                        design with lambda4 = 0
GPBIB4B                 Generalized rectangular right angular (4)
                        design with lambda4 not equal to 0
GPBIB5                  Generalized rectangular right angular (5)
                        design.
GPBIB7A                 Generalized rectangular right angular (7)
                        design with lambda(i) equal to lamda(i+4)
                        (i=1,...,4)
GPBIB7B                 Generalized rectangular right angular (7)
                        design with distinct lambda(i) (i=1,...,7)
UType                   U-type design via some PBIB designs
